Qt: don't allow negative screen-numbers

Close #13643

diff --git a/modules/gui/qt4/components/controller.cpp b/modules/gui/qt4/components/controller.cpp
index 07758b198c321b458d2edb6170d3e83fb127ad65..39aff5939c6455844914fab23428ed876c51c0d5 100644 (file)
--- a/modules/gui/qt4/components/controller.cpp
+++ b/modules/gui/qt4/components/controller.cpp
@@ -961,7 +961,7 @@ void FullscreenControllerWidget::toggleFullwidth()
 
 int FullscreenControllerWidget::targetScreen()
 {
-    if( i_screennumber == -1 || i_screennumber > QApplication::desktop()->numScreens() )
+    if( i_screennumber < 0 || i_screennumber > QApplication::desktop()->numScreens() )
         return QApplication::desktop()->screenNumber( p_intf->p_sys->p_mi );
     return i_screennumber;
 }