--- a\src\win\iupwin_loop.c	Mon Dec 11 14:52:42 2017
+++ b\src\win\iupwin_loop.c	Wed Jan 24 23:04:34 2018
@@ -113,7 +113,6 @@
     }
   } while (ret);
 
-  win_main_loop--;
   return IUP_NOERROR;
 }