torture_logmeta - fix ugly tv_sec arithmetic overflow problem
torture_logmeta - fix ugly tv_sec arithmetic overflow problem

Exposed by QA 479, but only on platforms where tv_sec from the
system's struct timeval is a signed 32-bit number.

andyvand/cygpcpfans,tjanez/pcp,prasincs/pcp,prasincs/pcp,ryandoyle/pcp_original,ryandoyle/pcp_original,tjanez/pcp,aeg-aeg/pcpfans,edwardt/pcp,edwardt/pcp,mbaldessari/pcp,tjanez/pcp,aeg-aeg/pcpfans,adfernandes/pcp,aeg-aeg/pcpfans,wuliming/pcp,ryandoyle/pcp_original,adfernandes/pcp,prasincs/pcp,adfernandes/pcp,wuliming/pcp,edwardt/pcp,andyvand/cygpcpfans,adfernandes/pcp,adfernandes/pcp,andyvand/cygpcpfans,edwardt/pcp,prasincs/pcp,edwardt/pcp,prasincs/pcp,wuliming/pcp,mbaldessari/pcp,mbaldessari/pcp,adfernandes/pcp,edwardt/pcp,ryandoyle/pcp_original,mbaldessari/pcp,prasincs/pcp,tjanez/pcp,edwardt/pcp,mbaldessari/pcp,adfernandes/pcp,prasincs/pcp,adfernandes/pcp,ryandoyle/pcp_original,andyvand/cygpcpfans,aeg-aeg/pcpfans,tjanez/pcp,wuliming/pcp,tjanez/pcp,mbaldessari/pcp,andyvand/cygpcpfans,aeg-aeg/pcpfans,wuliming/pcp,prasincs/pcp,andyvand/cygpcpfans,ryandoyle/pcp_original,tjanez/pcp,wuliming/pcp,ryandoyle/pcp_original,andyvand/cygpcpfans,andyvand/cygpcpfans,aeg-aeg/pcpfans,tjanez/pcp,wuliming/pcp,edwardt/pcp,aeg-aeg/pcpfans,ryandoyle/pcp_original,aeg-aeg/pcpfans,wuliming/pcp