[SSSD] [PATCH] UTIL: Use errno_t in TEVENT_REQ_RETURN_ON_ERROR

[Lukas Slebodnik]

ehlo,

attached is a patch for TEVENT_REQ_RETURN_ON_ERROR
which was discussed in dp_provider related thread.

It "fixes" 6 clang warnings
and 150 UNINIT from coverity (visible only in --agresive mode)

BTW feel fre to prose different error code
for result of down casting == 0.
It should not happen but one never knows.

LS