chan_iax2.c: Avoid crash with IAX2 switch support. #198
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cherry-pick-to: 20 |
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Successfully merged to branch master and cherry-picked to ["20","18"] |
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A change made in 82cebaa did not properly handle the case when a channel was not provided, triggering a crash. ast_check_hangup(...) does not protect against NULL pointers.
Fixes #180