or trigger crashes server

Under some circumstances a combination of VIEWs, subselects with outer
references and PS/SP/triggers could lead to use of uninitialized memory
and server crash as a result.

Fixed by changing the code in Item_field::fix_fields() so that in cases
when the field is a VIEW reference, we first check whether the field
is also an outer reference, and mark it appropriately before returning.


mysql-test/r/view.result:
  Added a test case for bug #33389.
mysql-test/t/view.test:
  Added a test case for bug #33389.
sql/item.cc:
  In cases when in Item_field::fix_fields() from_field is a view reference,
  do not return too early, i.e. before marking the reference as an outer
  one when needed.