Removed use of compound initializers in time.h
Removed use of compound initializers in time.h

Summary: Anjay's `make codegen_check_cxx` was spitting out a ton of warnings, because `<avsystem/commons/time.h>` was being included from C++ and it included compound initializers, which are illegal there.

Test Plan: make check; make _C ../anjay codegen_check_cxx

Reviewers: marian!, mkrawiec!, kpanek!, molczyk!

Differential Revision: https://phabricator.avsystem.com/D7431

AVSystem/avs_commons,AVSystem/avs_commons,AVSystem/avs_commons,AVSystem/avs_commons