Fixing the build failure on Windows debug build.

sql/log_event.cc

@@ -2852,17 +2852,24 @@ Query_log_event::Query_log_event(const char* buf, uint event_len,
     sql_parse.cc
     */
 
+#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
   if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1
                                                     +  time_zone_len + 1
                                                     +  user.length + 1
                                                     +  host.length + 1
                                                     +  data_len + 1
-#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
                                                     +  sizeof(size_t)//for db_len
                                                     +  db_len + 1
-                                                    + QUERY_CACHE_FLAGS_SIZE
+                                                    +  QUERY_CACHE_FLAGS_SIZE,
+                                                       MYF(MY_WME))))
+#else
+  if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1
+                                                    +  time_zone_len + 1
+                                                    +  user.length + 1
+                                                    +  host.length + 1
+                                                    +  data_len + 1,
+                                                       MYF(MY_WME))))
 #endif
-                                                    , MYF(MY_WME))))
       DBUG_VOID_RETURN;
   if (catalog_len)                                  // If catalog is given
   {