BUG/MEDIUM: hlua: Don't call RESET_SAFE_LJMP if SET_SAFE_LJMP returns 0.

If SET_SAFE_LJMP returns 0, the spinlock is already unlocked, and lua_atpanic
is already set back to hlua_panic_safe, so there's no need to call
RESET_SAFE_LJMP.

This should be MFC'd into 1.8.
1 file changed