MWL#90: Switch update_depend_map() back to single loop (so that diff is smaller)

sql/sql_select.cc

@@ -9268,13 +9268,8 @@ only_eq_ref_tables(JOIN *join,ORDER *order,table_map tables)
 
 static void update_depend_map(JOIN *join)
 {
-  List_iterator<JOIN_TAB_RANGE> it(join->join_tab_ranges);
-  JOIN_TAB_RANGE *jt_range;
-
-  while ((jt_range= it++))
-  {
-    for (JOIN_TAB *join_tab=jt_range->start; join_tab != jt_range->end; 
-         join_tab++)
+  for (JOIN_TAB *join_tab= first_linear_tab(join, WITH_CONST_TABLES); join_tab;
+       join_tab= next_linear_tab(join, join_tab, WITH_BUSH_ROOTS))
   {
     TABLE_REF *ref= &join_tab->ref;
     table_map depend_map=0;
@@ -9292,7 +9287,6 @@ static void update_depend_map(JOIN *join)
         ref->depend_map|=(*tab)->ref.depend_map;
     }
   }
-  }
 }