don't treat undefined function names as errors
don't treat undefined function names as errors

a function doesn't appear to be defined in a given
context, it might be because it's the name of a local
variable that will be bound to a function at runtime.
(of course, it might turn out that it's not, and then
there's some work to do to figure out how to tell
the user what happened...)

BBN-Q/pyqgl2,BBN-Q/pyqgl2