Backported from maria-5.5 the fix in the patch for mdev-4418 that

had been discovered when merging the patch from 5.3 into 5.5.

sql/sql_select.cc

@@ -1219,10 +1219,7 @@ JOIN::optimize()
       zero_result_cause=
         "Impossible WHERE noticed after reading const tables";
       select_lex->mark_const_derived(zero_result_cause);
-      if (select_options & SELECT_DESCRIBE)
-      {
       conds=new Item_int((longlong) 0,1);
-      }
       goto setup_subq_exit;
     }
   }