Nested @switches don't work right

[brondsem]

If a function has @switches(foo=False) and calls another function which also has that decorator, the patches get messed up and you can end up with the wrong value. Didn't dig into it much, but in this case was getting a truthy value when it should've been False.

[kadams54]

OK. I'll dig into it more, but if you want to whip a test case, I won't complain ;-)