[sr-dev] [tracker] Task opened: Uninitialized $var returns 0 instead of <null>

[Juha Heinanen]

sip-router writes:

> Details - There is an annoying difference between an uninitialized
> $avp and $var. When the value is queried, the $avp returns <null>
> whereas the $var returns 0. The latter is wrong, as 0 is a meaningful
> value.

this has been discussed before.  check archives.  if i remember
correctly, vars are implemented in such a way that it is not possible to
differentiate 0 from null.

-- juha