Qt4: fix prototype

modules/gui/qt4/input_manager.cpp

@@ -958,7 +958,7 @@ MainInputManager::MainInputManager( intf_thread_t *_p_intf )
     repeat.addCallback( this, SLOT(notifyRepeatLoop(bool)) );
     loop.addCallback( this, SLOT(notifyRepeatLoop(bool)) );
 
-    volume.addCallback( this, SLOT(notifyVolume(int)) );
+    volume.addCallback( this, SLOT(notifyVolume(int64_t)) );
     mute.addCallback( this, SLOT(notifyMute(bool)) );
 
     /* Warn our embedded IM about input changes */
@@ -1217,7 +1217,7 @@ static int LeafToParent( vlc_object_t *p_this, const char *psz_var,
     return VLC_SUCCESS;
 }
 
-void MainInputManager::notifyVolume( int volume )
+void MainInputManager::notifyVolume( int64_t volume )
 {
     emit volumeChanged( volume / (float)AOUT_VOLUME_DEFAULT );
 }

modules/gui/qt4/input_manager.hpp

@@ -292,7 +292,7 @@ public slots:
 private slots:
     void notifyRandom( bool );
     void notifyRepeatLoop( bool );
-    void notifyVolume( int );
+    void notifyVolume( int64_t );
     void notifyMute( bool );
 signals:
     void inputChanged( input_thread_t * );