winex11: Added missing release_win_data() to create_foreign_window().

dlls/winex11.drv/window.c

@@ -1897,11 +1897,12 @@ HWND create_foreign_window( Display *display, Window xwin )
     SetPropA( hwnd, foreign_window_prop, (HANDLE)xwin );
     XSaveContext( display, xwin, winContext, (char *)data->hwnd );
 
-    ShowWindow( hwnd, SW_SHOW );
-
     TRACE( "win %lx parent %p style %08x %s -> hwnd %p\n",
            xwin, parent, style, wine_dbgstr_rect(&data->window_rect), hwnd );
 
+    release_win_data( data );
+
+    ShowWindow( hwnd, SW_SHOW );
     return hwnd;
 }