Bug#36526369 MySQL server crashes on UPDATE after ALTER TABLE

- Post push fix for memory leak Change-Id: I034bb20c71dfe3ae467e762b2dd7c7f95fb0679b

Author: mayprasa

storage/innobase/mtr/mtr0log.cc

@@ -851,6 +851,9 @@ bool mlog_open_and_write_index(mtr_t *mtr, const byte *rec,
  }
 
  if (!mlog_open(mtr, alloc, log_ptr)) {
+ if (is_versioned) {
+ delete[] fields_with_changed_order;
+ }
  /* logging is disabled */
  return (false);
  }