prefixcmp(): fix-up leftover strncmp().

There were instances of strncmp() that were formatted improperly
(e.g. whitespace around parameter before closing parenthesis)
that caused the earlier mechanical conversion step to miss
them.  This step cleans them up.

Signed-off-by: Junio C Hamano <junkio@cox.net>

revision.c

@@ -832,7 +832,7 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
 				revs->max_count = atoi(argv[++i]);
 				continue;
 			}
-			if (!strncmp(arg,"-n",2)) {
+			if (!prefixcmp(arg, "-n")) {
 				revs->max_count = atoi(arg + 2);
 				continue;
 			}