correct exit from mysql_create_view to restore ennvironment (BUG#12468)
view.result, view.test:
  test of CRETE VIEW in SP


mysql-test/t/view.test:
  test of CRETE VIEW in SP
mysql-test/r/view.result:
  test of CRETE VIEW in SP
sql/sql_view.cc:
  correct exit from mysql_create_view to restore ennvironment