Simplify @if handling code a bit.
Simplify @if handling code a bit.

Removes another lingering _undefined_re.

cpfair/pyScss,cpfair/pyScss,Kronuz/pyScss,cpfair/pyScss,Kronuz/pyScss,hashamali/pyScss,Kronuz/pyScss,Kronuz/pyScss,hashamali/pyScss,hashamali/pyScss