updated for version 7.4.021

Problem:    NFA regexp: Using \ze in one branch which doesn't match may cause
            end of another branch to be wrong. (William Fugh)
Solution:   Set end position if it wasn't set yet.

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    21,
 /**/
     20,
 /**/