core: parse/contact: jump to error on too many contacts

(cherry picked from commit f69b22d44cb5abc803c2b58790dd33f2310c1c59)

src/core/parser/contact/contact.c

@@ -340,7 +340,7 @@ int parse_contacts(str *_s, contact_t **_c)
 
 		if(n > KSR_MAX_CONTACTS) {
 			LM_ERR("too many contacts: %d\n", n);
-			return -1;
+			goto error;
 		}
 		if(_s->len == 0) {
 			LM_ERR("text after comma missing\n");