os: always check if client is local when connection is accepted

LocalClient is used for all DRI2 requests that makes it frequently
called function. Querying if connection is local or not takes 10-15us
(on ARM) depending on malloc speed.

Signed-off-by: Pauli Nieminen <ext-pauli.nieminen@nokia.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>

os/connection.c

@@ -746,6 +746,7 @@ AllocNewConnection (XtransConnInfo trans_conn, int fd, CARD32 conn_time)
 	free(oc);
 	return NullClient;
     }
+    oc->local_client = ComputeLocalClient(client);
 #if !defined(WIN32)
     ConnectionTranslation[fd] = client->index;
 #else