WL#2486 - natural and using join

Fixed debug printout.

sql/table.cc

@@ -2547,7 +2547,7 @@ void Field_iterator_table_ref::set_field_iterator()
     natural_join_it.set(table_ref);
     field_it= &natural_join_it;
     DBUG_PRINT("info",("field_it for '%s' is Field_iterator_natural_join",
-                       table_ref->table_name));
+                       table_ref->alias));
   }
   /* This is a merge view, so use field_translation. */
   else if (table_ref->field_translation)
@@ -2557,7 +2557,7 @@ void Field_iterator_table_ref::set_field_iterator()
     view_field_it.set(table_ref);
     field_it= &view_field_it;
     DBUG_PRINT("info", ("field_it for '%s' is Field_iterator_view",
-                        table_ref->table_name));
+                        table_ref->alias));
   }
   /* This is a base table or stored view. */
   else
@@ -2566,7 +2566,7 @@ void Field_iterator_table_ref::set_field_iterator()
     table_field_it.set(table_ref);
     field_it= &table_field_it;
     DBUG_PRINT("info", ("field_it for '%s' is Field_iterator_table",
-                        table_ref->table_name));
+                        table_ref->alias));
 
   }
   DBUG_VOID_RETURN;