linux-user/signal.c: Avoid using uninitialized data in ARM sigreturn
Rephrase code used in ARM sigreturn functions to avoid using uninitialized variables. This fixes one genuine problem ('frame' would not be initialized if we took the error-exit path because our stackpointer was misaligned) and one which is clang being alarmist (frame_addr wouldn't be initialized, though this is harmless since unlock_user_struct ignores its second argument in these cases; however since we don't generally make use of this not-really-documented effect it's better avoided). Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> Message-id: 1375095632-13735-3-git-send-email-peter.maydell@linaro.org Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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