[asterisk-dev] [Code Review] unchecked_return audit and fixes

[jrose]

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https://reviewboard.asterisk.org/r/1905/
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Review request for Asterisk Developers and Matt Jordan.


Summary
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Makes corrections for a number of unchecked return reports from Coverity and marks a handful of others as being ignorable (because the return seems genuinely inconsequential for these cases).  There are a couple oddities that might need a second look.


This addresses bug ASTERISK-19658.
    https://issues.asterisk.org/jira/browse/ASTERISK-19658


Diffs
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  /branches/1.8/apps/app_queue.c 365473 
  /branches/1.8/apps/app_voicemail.c 365473 
  /branches/1.8/channels/chan_iax2.c 365473 
  /branches/1.8/channels/chan_sip.c 365473 
  /branches/1.8/channels/iax2-provision.c 365473 
  /branches/1.8/channels/sig_analog.c 365473 
  /branches/1.8/funcs/func_devstate.c 365473 
  /branches/1.8/funcs/func_lock.c 365473 
  /branches/1.8/main/acl.c 365473 
  /branches/1.8/main/asterisk.c 365473 
  /branches/1.8/main/db.c 365473 
  /branches/1.8/main/features.c 365473 
  /branches/1.8/main/pbx.c 365473 
  /branches/1.8/main/xmldoc.c 365473 
  /branches/1.8/res/ael/ael.flex 365473 

Diff: https://reviewboard.asterisk.org/r/1905/diff


Testing
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Testing done depends on the particular issue that was being poked at. In some cases, it was as simple as a snap judgement to add a warning. In a couple others, I would test what would happen as a consequence of an unanticipated return.


Thanks,

jrose

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