Fix crash when posting a message to a send port with port id 0.

Fix crash when posting a message to a send port with port id 0.

BUG=
R=zra@google.com

Committed: https://code.google.com/p/dart/source/detail?r=44906

[Cutch, 2015-04-03 23:33:02]

johnmccutchan@google.com changed reviewers:
+ zra@google.com

[zra, 2015-04-04 05:03:48]

lgtm

https://codereview.chromium.org/1056223002/diff/1/runtime/vm/dart_api_impl.cc
File runtime/vm/dart_api_impl.cc (right):

https://codereview.chromium.org/1056223002/diff/1/runtime/vm/dart_api_impl.cc...
runtime/vm/dart_api_impl.cc:1628: if (port_id == ILLEGAL_PORT) {
Should this go after grabbing the current isolate so we don't try to allocate a
new error when there isn't one? That seems to be the pattern in other calls.

[Cutch, 2015-04-05 19:06:09]

https://codereview.chromium.org/1056223002/diff/1/runtime/vm/dart_api_impl.cc
File runtime/vm/dart_api_impl.cc (right):

https://codereview.chromium.org/1056223002/diff/1/runtime/vm/dart_api_impl.cc...
runtime/vm/dart_api_impl.cc:1628: if (port_id == ILLEGAL_PORT) {
On 2015/04/04 05:03:47, zra wrote:
> Should this go after grabbing the current isolate so we don't try to allocate
a
> new error when there isn't one? That seems to be the pattern in other calls.

Done.

[Cutch, 2015-04-05 19:06:43]

Committed patchset #2 (id:20001) manually as 44906 (presubmit successful).

[turnidge, 2015-04-06 18:21:25]

turnidge@google.com changed reviewers:
+ turnidge@google.com

[turnidge, 2015-04-06 18:21:25]

lgtm