Make sure pods_v_sanitized passes along $strict

I fear this might generate some more issues when it's fixed.  Right now if someone calls pods_v_sanitized or pods_var
with strict set and the value returned is 0 it will actually be returned, but once fixed 0 doesn't pass empty()
then the default will be returned
Merge pull request #2472 from jamesgol/podsvsanitized

Make sure pods_v_sanitized passes along $strict