patch 7.4.1901

Problem:    Win32: the "Disabled" menu items would appear enabled.
Solution:   Use submenu_id if there is a parent. (Shane Harper, closes #834)

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1901,
 /**/
     1900,
 /**/