restore the uglyness: call the resize callback every frame again, even

though the window wasn't resized. I'm just not adventurous enough for
a cleaner solution in the light of the upcoming release. At least the
xsize/ysize properties aren't set each frame any more, so listeners
work now properly.

src/Main/renderer.cxx

@@ -336,6 +336,10 @@ FGRenderer::update( bool refresh_camera_settings ) {
     current__view->set_dirty();
 
     if ( refresh_camera_settings ) {
+        // update view port
+        resize( fgGetInt("/sim/startup/xsize"),
+                fgGetInt("/sim/startup/ysize") );
+
         // Tell GL we are switching to model view parameters
         glMatrixMode(GL_MODELVIEW);
         glLoadIdentity();