Merge pull request
#1933 from bfroehle/oinspect_find_file...
Merge pull request
#1933 from bfroehle/oinspect_find_file
oinspect.find_file: Additional safety if file cannot be found.
In some code paths, e.g. when introspecting fortran objects generated by f2py, oinspect.find_file will raise an UnboundLocalError. Prevent this by setting fname to None.