fix(xkeyboard): Minor tweaks

.gitmodules

@@ -5,4 +5,4 @@
 [submodule "lib/xpp"]
 	path = lib/xpp
 	url = https://github.com/jaagr/xpp
-	branch = 1.3.3
+	branch = 1.3.4

include/x11/extensions_fwd.hpp

@@ -28,12 +28,9 @@ namespace xpp {
     class extension;
   }
 #endif
-}
-
-POLYBAR_NS
-
 #if ENABLE_XKB_EXT
-  class xkb_extension;
+  namespace xkb {
+    class extension;
+  }
 #endif
-
+}
-POLYBAR_NS_END

lib/xpp

@@ -1 +1 @@
-Subproject commit 34d0cf14e928270e3dd2ff3aab97f2208d409bff
+Subproject commit 49ed2c142109fe92932ae906fc4b40b5138b2809

src/modules/xkeyboard.cpp

@@ -99,12 +99,14 @@ namespace modules {
     if (tag == TAG_LABEL_LAYOUT) {
       builder->node(m_layout);
     } else if (tag == TAG_LABEL_INDICATOR) {
+      size_t n{0};
       for (auto&& indicator : m_indicators) {
-        if (indicator != *m_indicators.begin()) {
+        if (n++) {
           builder->space(m_formatter->get(DEFAULT_FORMAT)->spacing);
         }
         builder->node(indicator.second);
       }
+      return n > 0;
     } else {
       return false;
     }
@@ -154,7 +156,7 @@ namespace modules {
    * Handler for XCB_XKB_INDICATOR_STATE_NOTIFY events
    */
   void xkeyboard_module::handle(const evt::xkb_indicator_state_notify& evt) {
-    if (m_xkbnotify.allow(evt->time)) {
+    if (m_xkbnotify.allow(evt->time) && m_keyboard) {
       m_keyboard->set(m_connection.xkb().get_state(XCB_XKB_ID_USE_CORE_KBD)->lockedMods);
       update();
     }

src/x11/registry.cpp

@@ -1,5 +1,6 @@
 #include "x11/connection.hpp"
 #include "x11/extensions.hpp"
+
 #include "x11/registry.hpp"
 
 POLYBAR_NS