exec.c: Initialize sa_flags passed to sigaction()

Coverity points out that in the user-only version of cpu_abort() we
call sigaction() with a partially initialized struct sigaction
(CID 1005351). Correct the omission.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180515182700.31736-1-peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed