TQFileDialog: cleanup pixmaps before destroying TQApplication

Otherwise it results in small memmory leakage on exit of Xlib data.

Signed-off-by: Alexander Golubev <fatzer2@gmail.com>
(cherry picked from commit fb0d62eec8)

src/dialogs/qfiledialog.cpp

@@ -492,6 +492,10 @@ static TQString toRootIfNotExists( const TQString &path )
     return drives->getFirst()->filePath();
 }
 
+static void tqt_do_qfd_cleanup_pixmap() {
+    qfd_cleanup_pixmap.clear();
+}
+
 static bool isDirectoryMode( int m )
 {
     return m == TQFileDialog::Directory || m == TQFileDialog::DirectoryOnly;
@@ -608,6 +612,10 @@ static void makeVariables() {
 	qfd_cleanup_pixmap.add( &goBackIcon );
 	fifteenTransparentPixels = new TQPixmap( closedFolderIcon->width(), 1 );
 	qfd_cleanup_pixmap.add( &fifteenTransparentPixels );
+
+	// On X11 the pixmaps should be cleanup before we disconnect from the server
+	tqAddPostRoutine(&tqt_do_qfd_cleanup_pixmap);
+
 	TQBitmap m( fifteenTransparentPixels->width(), 1 );
 	m.fill( TQt::color0 );
 	fifteenTransparentPixels->setMask( m );