Add missing brackets to multi-statement if in SaveServerAuthorizations

From Alan Coopersmith in xdm.

app/xenodm/xenodm/auth.c

@@ -348,6 +348,7 @@ SaveServerAuthorizations (
 	     * to the auth file so xrdb and setup programs don't fail.
 	     */
 	    if (auths[i]->data_length > 0)
+	    {
 		if (!XauWriteAuth (auth_file, auths[i]))
 		{
 		    Debug ("XauWriteAuth() failed\n");
@@ -359,6 +360,7 @@ SaveServerAuthorizations (
 		    ret = FALSE;
 		}
 	    }
+	}
 	/*
 	 * XXX: This is not elegant, but stdio has no truncation function.
 	 */