Bug #24403 valgrind complained on uninited st_table, rbr + innodb

  
  open_table_from_share did not initialize table->record members. that was
  interpreted as the error by valgrind.
  
  Fixed with bzero-ing the members if compilation with -DHAVE_purify.

sql/table.cc

@@ -1377,7 +1377,9 @@ int open_table_from_share(THD *thd, TABLE_SHARE *share, const char *alias,
   if (!(record= (byte*) alloc_root(&outparam->mem_root,
                                    share->rec_buff_length * records)))
     goto err;                                   /* purecov: inspected */
-
+#ifdef HAVE_purify
+     bzero(record, share->rec_buff_length * records);
+#endif  
   if (records == 0)
   {
     /* We are probably in hard repair, and the buffers should not be used */