Fix bug where set would sometimes fail within if

Fix bug where set would sometimes fail within if

There was a bug that came as the result of an early optimization done
within ID tracking that caused loading parameters to fail in a very
specific and rare edge case. That edge case only occurred when the
parameter was being set within all 3 standard branches of an if block,
since the optimization would assume that the parameter was never being
referenced and was only ever being set. This would cause the variable to
be set to undefined.

The fix for this was to remove the optimization and still continue to
load in the parameter even if it is set in all 3 branches.