Plug memory leaks in request_pty and channel->channel_type

src/channel.c

@@ -337,6 +337,7 @@ LIBSSH2_API int libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL *channel, char *t
 		LIBSSH2_FREE(session, packet);
 		return -1;
 	}
+	LIBSSH2_FREE(session, packet);
 
 	while (1) {
 		unsigned char *data;
@@ -663,6 +664,11 @@ LIBSSH2_API int libssh2_channel_free(LIBSSH2_CHANNEL *channel)
 		LIBSSH2_FREE(session, data);
 	}
 
+	/* free "channel_type" */
+	if (channel->channel_type) {
+		LIBSSH2_FREE(session, channel->channel_type);
+	}
+
 	/* Unlink from channel brigade */
 	if (channel->prev) {
 		channel->prev->next = channel->next;