patch 7.4.1991

Problem:    glob() does not add a symbolic link when there are no wildcards.
Solution:   Remove the call to mch_getperm().

src/version.c

@@ -758,6 +758,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1991,
 /**/
     1990,
 /**/