patch 7.4.1303

Problem:    A Funcref is not accepted as a callback.
Solution:   Make a Funcref work. (Damien)

src/version.c

@@ -747,6 +747,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1303,
 /**/
     1302,
 /**/