-fixed bug in Rex where "if 'X' in env" did not work (it added X to env and eval'd to True always)
-fixed bug in Rex where "if 'X' in env" did not work (it added X to env and eval'd to True always)

instinct-vfx/rez,nerdvegas/rez,nerdvegas/rez,instinct-vfx/rez