[PULL 14/16] multifd: multifd_send_sync_main now returns negative on error

From: Leonardo Bras Even though multifd_send_sync_main() currently emits error_reports, it's callers don't really check it before continuing. Change multifd_send_sync_main() to return -1 on error and 0 on success. Also change all it's callers to make use of this change and possibly fail

[PULL 14/16] multifd: multifd_send_sync_main now returns negative on error

From: Leonardo Bras Even though multifd_send_sync_main() currently emits error_reports, it's callers don't really check it before continuing. Change multifd_send_sync_main() to return -1 on error and 0 on success. Also change all it's callers to make use of this change and possibly fail