Cleanup of unused variables.

Fixed "discover" in the handler API.

Fixed problem where handlerton was not zero'ed. I need to look around, I suspect this problem is more widespread. 


sql/ha_innodb.h:
  Unused variable
sql/ha_ndbcluster.cc:
  Added "discover" to handlerton.
sql/handler.cc:
  Added plugin loop and correctly now use handler API.
sql/handler.h:
  Removed unused variable. Added discover to handler API
sql/mysqld.cc:
  Removed unused variables.
sql/sql_plugin.cc:
  Fixed DBUG Enter comment (obvious cut paste mistake)
storage/csv/ha_tina.cc:
  Found that if we don't bzero handlerton, that things can go boom!
  
  This probably needs to be fixed for all handlers

1 files changed, 2 insertions, 1 deletions

diff --git a/sql/handler.h b/sql/handler.h
index 201a2f1980a..bfc502b0658 100644
--- a/sql/handler.h
+++ b/sql/handler.h
@@ -667,6 +667,8 @@ struct handlerton
    enum handler_create_iterator_result
      (*create_iterator)(enum handler_iterator_type type,
                         struct handler_iterator *fill_this_in);
+   int (*discover)(THD* thd, const char *db, const char *name,
+                           const void** frmblob, uint* frmlen);
 };
 
 
@@ -1589,7 +1591,6 @@ private:
 
 	/* Some extern variables used with handlers */
 
-extern handlerton *sys_table_types[];
 extern const char *ha_row_type[];
 extern TYPELIB tx_isolation_typelib;
 extern TYPELIB myisam_stats_method_typelib;