No more warnings in tomahawk code

src/accounts/xmpp/XmppInfoPlugin.cpp

@@ -25,6 +25,11 @@
 #include "utils/Logger.h"
 #include "TomahawkSettings.h"
 
+// Forward Declarations breaking QSharedPointer
+#if QT_VERSION < QT_VERSION_CHECK( 5, 0, 0 )
+    #include "Source.h"
+#endif
+
 
 // remove now playing status after PAUSE_TIMEOUT seconds
 static const int PAUSE_TIMEOUT = 10;

src/infoplugins/linux/mpris/MprisPlugin.h

@@ -27,6 +27,11 @@
 
 #include "../../InfoPluginDllMacro.h"
 
+// Forward Declarations breaking QSharedPointer
+#if QT_VERSION < QT_VERSION_CHECK( 5, 0, 0 )
+    #include "PlaylistInterface.h"
+#endif
+
 
 #include <QObject>
 #include <QVariant>

src/tomahawk/sourcetree/items/SourceTreeItem.cpp

@@ -21,6 +21,12 @@
 #include "audio/AudioEngine.h"
 #include "utils/Logger.h"
 
+// Forward Declarations breaking QSharedPointer
+#if QT_VERSION < QT_VERSION_CHECK( 5, 0, 0 )
+    #include "Query.h"
+#endif
+
+
 using namespace Tomahawk;