Complete missing part of Mats' HPUX NO_FLAGS fix

sql/log_event.h

@@ -1784,7 +1784,7 @@ class Rows_log_event : public Log_event
   /* Special constants representing sets of flags */
   enum 
   {
-      NO_FLAGS = 0U
+      RLE_NO_FLAGS = 0U
   };
 
   virtual ~Rows_log_event();