Don't segfault if bind() fails.

Add a return code to DIAL_start, and check it.
Fixes b/23789345

Change-Id: I1c4dae02ef4b22c96bc1aa9a06deff19e2de2826
3 files changed
tree: 4ec4e48814347bcb3e6071546e2c314c8c0bffdf
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