updated for version 7.4.622

Problem:    Compiler warning for unused argument.
Solution:   Add UNUSED.

src/regexp_nfa.c

@@ -6838,7 +6838,7 @@ theend:
 nfa_regtry(prog, col, tm)
     nfa_regprog_T   *prog;
     colnr_T	    col;
-    proftime_T	    *tm;	/* timeout limit or NULL */
+    proftime_T	    *tm UNUSED;	/* timeout limit or NULL */
 {
     int		i;
     regsubs_T	subs, m;

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    622,
 /**/
     621,
 /**/