Fix valgrind warnings

sql/opt_range.cc

@@ -341,8 +341,9 @@ class SEL_ARG :public Sql_alloc
   SEL_ARG(Field *field, uint8 part, uchar *min_value, uchar *max_value,
 	  uint8 min_flag, uint8 max_flag, uint8 maybe_flag);
   SEL_ARG(enum Type type_arg)
-    :min_flag(0),elements(1),use_count(1),left(0),right(0),next_key_part(0),
-    color(BLACK), type(type_arg)
+    :min_flag(0), max_part_no(0) /* first key part means 1. 0 mean 'no parts'*/, 
+     elements(1),use_count(1),left(0),right(0),
+     next_key_part(0), color(BLACK), type(type_arg)
   {}
   inline bool is_same(SEL_ARG *arg)
   {

sql/sql_select.cc

@@ -8521,7 +8521,7 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
   //for (i=join->const_tables ; i < join->tables ; i++)
   for (tab= first_linear_tab(join, TRUE), i= join->const_tables; 
        tab; 
-       tab= next_linear_tab(join, tab, TRUE), i++)
+       tab= next_linear_tab(join, tab, TRUE))
   {
     /*
       The approximation below for partial join cardinality is not good because
@@ -8533,8 +8533,11 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
     if ((tab->bush_root_tab && tab->bush_root_tab->bush_children->start == tab) || 
         (tab == join->join_tab + join->const_tables))
       prev_tab= NULL;
+    DBUG_ASSERT(tab->bush_children || tab->table == join->best_positions[i].table->table);
     tab->partial_join_cardinality= join->best_positions[i].records_read *
                                    (prev_tab? prev_tab->partial_join_cardinality : 1);
+    if (!tab->bush_children)
+      i++;
   }
  
   check_join_cache_usage_for_tables(join, options, no_jbuf_after);