[parrot/parrot] 31e87f: [ops] protect callmethod from non-PMC-object

[GitHub]

  Branch: refs/heads/smoke-me/null-call-gh1024
  Home:   https://github.com/parrot/parrot
  Commit: 31e87f84fa1e22fbfc375b279aa7dd9ebf8cf573
      https://github.com/parrot/parrot/commit/31e87f84fa1e22fbfc375b279aa7dd9ebf8cf573
  Author: Reini Urban <rurban at cpanel.net>
  Date:   2014-10-14 (Tue, 14 Oct 2014)

  Changed paths:
    M src/ops/core_ops.c
    M src/ops/object.ops
    M src/packfile/api.c
    M t/compilers/imcc/syn/const.t

  Log Message:
  -----------
  [ops] protect callmethod from non-PMC-object

fixes the SEGV in GH #1024 when calling a non-existent Sub.
Fails now with either with "Sub '' not found" in the pbc fixup
if the empty constant sub is immediate, or with
"Method '' not found for non-object" when the pbc fixup does not
detect the empty Sub object.
t/compilers/imcc/syn/const.t test 41