message: highgui: fix broken waitKey() condition in window_w32
diff: @@ -1976,7 +1976,7 @@ cvWaitKey( int delay )
  MSG message;
  int is_processed = 0;
  - if( delay <= 0 )
  + if( (delay <= 0) && hg_windows)
  GetMessage(&message, 0, 0, 0);
  else if( PeekMessage(&message, 0, 0, 0, PM_REMOVE) == FALSE )
  {
  