Extract PRINTER_ACTIVE into a noinline function

Having the original PRINTER_ACTIVE macro copied at multiple spots doesn't make sense.
Refactoring it into a non-inline function saved ~400 bytes of code.
It should be safe in terms of performance, all occurrences are at non-time critical spots.

Firmware/Marlin.h

@@ -355,7 +355,6 @@ extern uint16_t gcode_in_progress;
 extern LongTimer safetyTimer;
 
 #define PRINT_PERCENT_DONE_INIT 0xff
-#define PRINTER_ACTIVE (IS_SD_PRINTING || usb_timer.running() || isPrintPaused || (custom_message_type == CustomMsg::TempCal) || saved_printing || (lcd_commands_type == LcdCommands::Layer1Cal) || mmu_print_saved || homing_flag || mesh_bed_leveling_flag)
 
 extern bool printer_active();
 

Firmware/Marlin_main.cpp

@@ -562,9 +562,16 @@ void servo_init()
   #endif
 }
 
-bool printer_active()
+bool __attribute__((noinline)) printer_active() {
-{
+    return IS_SD_PRINTING
-    return PRINTER_ACTIVE;
+        || usb_timer.running()
+        || isPrintPaused
+        || (custom_message_type == CustomMsg::TempCal)
+        || saved_printing
+        || (lcd_commands_type == LcdCommands::Layer1Cal)
+        || mmu_print_saved
+        || homing_flag
+        || mesh_bed_leveling_flag;
 }
 
 bool fans_check_enabled = true;
@@ -9373,7 +9380,7 @@ static void handleSafetyTimer()
 #if (EXTRUDERS > 1)
 #error Implemented only for one extruder.
 #endif //(EXTRUDERS > 1)
-    if ((PRINTER_ACTIVE) || (!degTargetBed() && !degTargetHotend(0)) || (!safetytimer_inactive_time))
+    if (printer_active() || (!degTargetBed() && !degTargetHotend(0)) || (!safetytimer_inactive_time))
     {
         safetyTimer.stop();
     }
@@ -9427,7 +9434,7 @@ static uint16_t nFSCheckCount=0;
 	if (mmu_enabled == false)
 	{
 //-//		if (mcode_in_progress != 600) //M600 not in progress
-		if (!PRINTER_ACTIVE) bInhibitFlag=(menu_menu==lcd_menu_show_sensors_state); //Block Filament sensor actions if PRINTER is not active and Support::SensorInfo menu active
+		if (!printer_active()) bInhibitFlag=(menu_menu==lcd_menu_show_sensors_state); //Block Filament sensor actions if PRINTER is not active and Support::SensorInfo menu active
 #ifdef IR_SENSOR_ANALOG
 		bInhibitFlag=bInhibitFlag||bMenuFSDetect; // Block Filament sensor actions if Settings::HWsetup::FSdetect menu active
 #endif // IR_SENSOR_ANALOG
@@ -10933,7 +10940,7 @@ ISR(INT4_vect) {
 	EIMSK &= ~(1 << 4); //disable INT4 interrupt to make sure that this code will be executed just once 
 	SERIAL_ECHOLNPGM("INT4");
     //fire normal uvlo only in case where EEPROM_UVLO is 0 or if IS_SD_PRINTING is 1. 
-     if(PRINTER_ACTIVE && (!(eeprom_read_byte((uint8_t*)EEPROM_UVLO)))) uvlo_();
+     if(printer_active() && (!(eeprom_read_byte((uint8_t*)EEPROM_UVLO)))) uvlo_();
      if(eeprom_read_byte((uint8_t*)EEPROM_UVLO)) uvlo_tiny();
 }
 

Firmware/fancheck.cpp

@@ -137,7 +137,7 @@ void checkFanSpeed()
         // we may even send some info to the LCD from here
         fan_check_error = EFCE_FIXED;
     }
-    if ((fan_check_error == EFCE_FIXED) && !PRINTER_ACTIVE){
+    if ((fan_check_error == EFCE_FIXED) && !printer_active()){
         fan_check_error = EFCE_OK; //if the issue is fixed while the printer is doing nothing, reenable processing immediately.
         lcd_reset_alert_level(); //for another fan speed error
     }

Firmware/ultralcd.cpp

@@ -436,7 +436,7 @@ void lcdui_print_percent_done(void)
 {
 	const char* src = usb_timer.running()?_N("USB"):(IS_SD_PRINTING?_N(" SD"):_N("   "));
 	char per[4];
-	bool num = IS_SD_PRINTING || (PRINTER_ACTIVE && (print_percent_done_normal != PRINT_PERCENT_DONE_INIT));
+	bool num = IS_SD_PRINTING || (printer_active() && (print_percent_done_normal != PRINT_PERCENT_DONE_INIT));
 	if (!num || heating_status != HeatingStatus::NO_HEATING) // either not printing or heating
 	{
 		const int8_t sheetNR = eeprom_read_byte(&(EEPROM_Sheets_base->active_sheet));
@@ -492,7 +492,7 @@ void lcdui_print_time(void)
 {
     //if remaining print time estimation is available print it else print elapsed time
     int chars = 0;
-    if (PRINTER_ACTIVE) {
+    if (printer_active()) {
         uint16_t print_t = PRINT_TIME_REMAINING_INIT;
         uint16_t print_tr = PRINT_TIME_REMAINING_INIT;
         uint16_t print_tc = PRINT_TIME_REMAINING_INIT;
@@ -4805,7 +4805,7 @@ static void lcd_settings_menu()
 
 	MENU_ITEM_SUBMENU_P(_i("Temperature"), lcd_control_temperature_menu);////MSG_TEMPERATURE c=18
 
-	if (!PRINTER_ACTIVE || isPrintPaused)
+	if (!printer_active() || isPrintPaused)
     {
 	    MENU_ITEM_SUBMENU_P(_i("Move axis"), lcd_move_menu_axis);////MSG_MOVE_AXIS c=18
 	    MENU_ITEM_GCODE_P(_i("Disable steppers"), PSTR("M84"));////MSG_DISABLE_STEPPERS c=18
@@ -5505,7 +5505,7 @@ static void lcd_main_menu()
     if (farm_mode)
         MENU_ITEM_FUNCTION_P(_T(MSG_FILAMENTCHANGE), lcd_colorprint_change);//8
 
-    if ( moves_planned() || PRINTER_ACTIVE ) {
+    if ( moves_planned() || printer_active() ) {
         MENU_ITEM_SUBMENU_P(_i("Tune"), lcd_tune_menu);////MSG_TUNE c=18
     } else {
         MENU_ITEM_SUBMENU_P(_i("Preheat"), lcd_preheat_menu);////MSG_PREHEAT c=18