Prevented QT4 gui from changing size while maximized. This should fix...

Prevented QT4 gui from changing size while maximized. This should fix https://trac.videolan.org/vlc/ticket/1883Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit e83df29b)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/main_interface.cpp

@@ -637,7 +637,7 @@ QSize MainInterface::sizeHint() const
  */
 void MainInterface::doComponentsUpdate()
 {
-    if( isFullScreen() ) return;
+    if( isFullScreen() || isMaximized() ) return;
 
     msg_Dbg( p_intf, "Updating the geometry" );
     /* Here we resize to sizeHint() and not adjustsize because we want