Merge pull request #2106 from Wallacoloo/remove-hasGUI

Replace 'Engine::hasGUI()' with 'gui != nullptr'

plugins/MidiImport/MidiImport.cpp

@@ -97,7 +97,7 @@ bool MidiImport::tryImport( TrackContainer* tc )
 	}
 
 #ifdef LMMS_HAVE_FLUIDSYNTH
-	if( Engine::hasGUI() &&
+	if( gui != NULL &&
 		ConfigManager::inst()->defaultSoundfont().isEmpty() )
 	{
 		QMessageBox::information( gui->mainWindow(),
@@ -110,7 +110,7 @@ bool MidiImport::tryImport( TrackContainer* tc )
 				"settings dialog and try again." ) );
 	}
 #else
-	if( Engine::hasGUI() )
+	if( gui )
 	{
 		QMessageBox::information( gui->mainWindow(),
 			tr( "Setup incomplete" ),

plugins/stk/mallets/mallets.cpp

@@ -34,6 +34,7 @@
 
 #include "Engine.h"
 #include "gui_templates.h"
+#include "GuiApplication.h"
 #include "InstrumentTrack.h"
 
 #include "embed.cpp"
@@ -327,7 +328,7 @@ malletsInstrumentView::malletsInstrumentView( malletsInstrument * _instrument,
 	m_spreadKnob->setHintText( tr( "Spread:" ), "" );
 
 	// try to inform user about missing Stk-installation
-	if( _instrument->m_filesMissing && Engine::hasGUI() )
+	if( _instrument->m_filesMissing && gui != NULL )
 	{
 		QMessageBox::information( 0, tr( "Missing files" ),
 				tr( "Your Stk-installation seems to be "