Core/Misc: Fix GCC 8 warnings

src/server/database/Database/MySQLConnection.cpp

@@ -512,9 +512,8 @@ bool MySQLConnection::_HandleMySQLErrno(uint32 errNo, uint8 attempts /*= 5*/)
                 mysql_close(GetHandle());
                 m_Mysql = nullptr;
             }
-
-            /*no break*/
         }
+        /* fallthrough */
         case CR_CONN_HOST_ERROR:
         {
             TC_LOG_INFO("sql.sql", "Attempting to reconnect to the MySQL server...");