VST: Fix Qt4 compilation

plugins/vst_base/CMakeLists.txt

@@ -29,7 +29,7 @@ SET(REMOTE_VST_PLUGIN_FILEPATH "RemoteVstPlugin" CACHE STRING "Relative file pat
 ADD_DEFINITIONS(-DREMOTE_VST_PLUGIN_FILEPATH="${REMOTE_VST_PLUGIN_FILEPATH}")
 BUILD_PLUGIN(vstbase vst_base.cpp VstPlugin.cpp VstPlugin.h communication.h MOCFILES VstPlugin.h)
 
-IF(LMMS_BUILD_LINUX)
+IF(LMMS_BUILD_LINUX AND WANT_QT5)
 	TARGET_LINK_LIBRARIES(vstbase qx11embedcontainer)
 ENDIF()
 

src/core/ConfigManager.cpp

@@ -35,10 +35,6 @@
 
 #include "lmmsversion.h"
 
-#ifdef LMMS_BUILD_LINUX
-#include <QtX11Extras/QX11Info>
-#endif
-
 static inline QString ensureTrailingSlash( const QString & s )
 {
 	if( ! s.isEmpty() && !s.endsWith('/') && !s.endsWith('\\') )

src/gui/SetupDialog.cpp

@@ -67,10 +67,6 @@
 #include "MidiApple.h"
 #include "MidiDummy.h"
 
-#ifdef LMMS_BUILD_LINUX
-#include <QtX11Extras/QX11Info>
-#endif
-
 inline void labelWidget( QWidget * _w, const QString & _txt )
 {
 	QLabel * title = new QLabel( _txt, _w );