remote.c: refactor creation of new dst ref

This refactors open-coded sequence to create a new "struct ref"
and link it to the tail of dst list into a new function.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

remote.c

@@ -406,6 +406,18 @@ static struct ref *try_explicit_object_name(const char *name)
 	return ref;
 }
 
+static struct ref *make_dst(const char *name, struct ref ***dst_tail)
+{
+	struct ref *dst;
+	size_t len;
+
+	len = strlen(name) + 1;
+	dst = xcalloc(1, sizeof(*dst) + len);
+	memcpy(dst->name, name, len);
+	link_dst_tail(dst, dst_tail);
+	return dst;
+}
+
 static int match_explicit(struct ref *src, struct ref *dst,
 			  struct ref ***dst_tail,
 			  struct refspec *rs,
@@ -447,23 +459,13 @@ static int match_explicit(struct ref *src, struct ref *dst,
 	case 1:
 		break;
 	case 0:
-		if (!memcmp(dst_value, "refs/", 5)) {
-			int len = strlen(dst_value) + 1;
-			matched_dst = xcalloc(1, sizeof(*dst) + len);
-			memcpy(matched_dst->name, dst_value, len);
-			link_dst_tail(matched_dst, dst_tail);
-		}
-		else if (!strcmp(rs->src, dst_value) &&
-			 matched_src) {
+		if (!memcmp(dst_value, "refs/", 5))
+			matched_dst = make_dst(dst_value, dst_tail);
+		else if (!strcmp(rs->src, dst_value) && matched_src)
 			/* pushing "master:master" when
 			 * remote does not have master yet.
 			 */
-			int len = strlen(matched_src->name) + 1;
-			matched_dst = xcalloc(1, sizeof(*dst) + len);
-			memcpy(matched_dst->name, matched_src->name,
-			       len);
-			link_dst_tail(matched_dst, dst_tail);
-		}
+			matched_dst = make_dst(matched_src->name, dst_tail);
 		else {
 			errs = 1;
 			error("dst refspec %s does not match any "
@@ -567,11 +569,8 @@ int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
 			goto free_name;
 		if (!dst_peer) {
 			/* Create a new one and link it */
-			int len = strlen(dst_name) + 1;
-			dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
-			memcpy(dst_peer->name, dst_name, len);
+			dst_peer = make_dst(dst_name, dst_tail);
 			hashcpy(dst_peer->new_sha1, src->new_sha1);
-			link_dst_tail(dst_peer, dst_tail);
 		}
 		dst_peer->peer_ref = src;
 	free_name: