ct: don't return zero on error paths
ct: don't return zero on error paths

Signed-off-by: Andrew Vagin <74c05afa918858348d6db8037d82fa8124870113@openvz.org>

avagin/libct,avagin/libct,xemul/libct,hallyn/libct,LK4D4/libct,xemul/libct,avagin/libct,LK4D4/libct,xemul/libct,hallyn/libct,LK4D4/libct,hallyn/libct,xemul/libct