Fix uninitialized memory read

lib/MySQL_Session.cpp

@@ -5271,8 +5271,8 @@ void MySQL_Session::handler___status_CONNECTING_CLIENT___STATE_SERVER_HANDSHAKE(
 					proxy_debug(PROXY_DEBUG_MYSQL_CONNECTION, 5, "Session=%p , DS=%p . User '%s' has exceeded the 'max_user_connections' resource (current value: %d)\n", this, client_myds, client_myds->myconn->userinfo->username, used_users);
 					char *a=(char *)"User '%s' has exceeded the 'max_user_connections' resource (current value: %d)";
 					char *b=(char *)malloc(strlen(a)+strlen(client_myds->myconn->userinfo->username)+16);
-					GloMyLogger->log_audit_entry(PROXYSQL_MYSQL_AUTH_ERR, this, NULL, b);
 					sprintf(b,a,client_myds->myconn->userinfo->username,used_users);
+					GloMyLogger->log_audit_entry(PROXYSQL_MYSQL_AUTH_ERR, this, NULL, b);
 					client_myds->myprot.generate_pkt_ERR(true,NULL,NULL,2,1226,(char *)"42000", b, true);
 					proxy_warning("User '%s' has exceeded the 'max_user_connections' resource (current value: %d)\n",client_myds->myconn->userinfo->username,used_users);
 					free(b);