Fixed ColorPrint current layer identification

src/libslic3r/GCode.cpp

@@ -1322,7 +1322,7 @@ void GCode::process_layer(
     // In case there are more toolchange requests that weren't done yet and should happen simultaneously, erase them all.
     // (Layers can be close to each other, model could have been resliced with bigger layer height, ...).
     bool colorprint_change = false;
-    while (!m_colorprint_heights.empty() && m_colorprint_heights.front()/*-EPSILON*/ < layer.print_z-EPSILON) {
+    while (!m_colorprint_heights.empty() && m_colorprint_heights.front()-EPSILON < layer.print_z) {
         m_colorprint_heights.erase(m_colorprint_heights.begin());
         colorprint_change = true;
     }