Commit
2f2f701949897b7a8d03f04a938b80b83bbaf7ed
by Pau Espin Pedrolgsmtap_util: Avoid sink_fd leak gsmtap_source_add_sinki() called multiple times
gti->sink_fd could leak if gsmtap_source_add_sink() was called multiple
times.
Also if gsmtap_source_add_sink_fd() failed, rc != -1 was returned and
hence a close() on a wrong fd would be attempted.
This commit fixes both issues, making the whole sink_fd field much more
robust.
Change-Id: I7af5a6c7d64954ee2cc013711702b846dfaa02b1
