transports: smart_pkt: fix memory leaks

src/transports/smart_pkt.c

@@ -271,6 +271,7 @@ static int ok_pkt(git_pkt **out, const char *line, size_t len)
 	line += 3; /* skip "ok " */
 	if (!(ptr = strchr(line, '\n'))) {
 		giterr_set(GITERR_NET, "Invalid packet line");
+		git__free(pkt);
 		return -1;
 	}
 	len = ptr - line;
@@ -314,6 +315,8 @@ static int ng_pkt(git_pkt **out, const char *line, size_t len)
 	line = ptr + 1;
 	if (!(ptr = strchr(line, '\n'))) {
 		giterr_set(GITERR_NET, "Invalid packet line");
+		git__free(pkt->ref);
+		git__free(pkt);
 		return -1;
 	}
 	len = ptr - line;