osmo_sock_init(): Fix memory leak in error path

We forgot to call freeaddrinfo() in an error path.

Change-Id: Iccbd3beef4c4a70dc443131b909c45e650d8c6a2
Fixes: Coverity CID 135217

src/socket.c

@@ -118,6 +118,7 @@ int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto,
 					" %s:%u: %s\n",
 					host, port, strerror(errno));
 				close(sfd);
+				freeaddrinfo(result);
 				return -EINVAL;
 			}
 		}