sql/sp.cc:
  Fixed memory leaks. Deletion of sps now in sp_cache.
sql/sp_cache.cc:
  Fixed memory leaks. Use implicit delete of objects to make sure
  they're always freed.
sql/sp_cache.h:
  Fixed memory leaks. Use implicit delete of objects to make sure
  they're always freed.
sql/sp_head.cc:
  Fixed memory leaks. Make sure we use the right mem_root during parsing.
sql/sp_head.h:
  Fixed memory leaks. Make sure we use the right mem_root during parsing.
sql/sql_parse.cc:
  Fixed memory leaks. Don't forget to free the temporary object created at definition.
sql/sql_yacc.yy:
  Fixed memory leaks. Make sure we use the right mem_root during parsing.