a fix (bug #8129: help.test fails using --ps-protocol)

sql/sql_help.cc:
  a fix (bug #8129: help.test fails using --ps-protocol)
  In case of 'range' we have to call quick->reset().

sql/sql_help.cc

@@ -559,7 +559,8 @@ SQL_SELECT *prepare_simple_select(THD *thd, Item *cond, TABLE_LIST *tables,
   if (!cond->fixed)
     cond->fix_fields(thd, tables, &cond);	// can never fail
   SQL_SELECT *res= make_select(table,0,0,cond,error);
-  if (*error || (res && res->check_quick(thd, 0, HA_POS_ERROR)))
+  if (*error || (res && res->check_quick(thd, 0, HA_POS_ERROR)) ||
+      (res->quick && res->quick->reset()))
   {
     delete res;
     res=0;