Qt4: fix a minor (but annoying) UI glitch on restart

Close #4041
(cherry picked from commit 10c68b56f970e05729b30a1c0f42cfe87d5fc55d)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/main_interface.cpp

@@ -465,6 +465,14 @@ inline void MainInterface::createStatusBar()
 
     CONNECT( THEMIM->getIM(), seekRequested( float ),
              timeLabel, setDisplayPosition( float ) );
+
+    /* This shouldn't be necessary, but for somehow reason, the statusBarr
+       starts at height of 20px and when a text is shown it needs more space.
+       But, as the QMainWindow policy doesn't allow statusBar to change QMW's
+       geometry, we need to force a height. If you have a better idea, please
+       tell me -- jb
+     */
+    statusBarr->setFixedHeight( statusBarr->sizeHint().height() + 2 );
 }
 
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