Replace it with two functions that won't run into issues with
trying to call bound objects, instances, etc. that weren't on
the stack. In general, if you have a callable value of unknown
type you should call `krk_callStack` with it on the stack followed
by all of its args; to make this abundantly clear, `krk_callStack`
only takes the argument count. For calling things we know to be
safe (closures and natives), there is `krk_callDirect`, which should
be used, for example, when calling core methods like __repr__.
444cb28d06