If I pass an inc file as command line parameter (or, more usefully,
try to open an inc file in the Windows editor from Windows Explorer
by double-clicking), this attempts to process the file as an INI
file, then chokes on it (this is not a valid ini file).
Tested using 3.7 RC3 Windows x64 version. I would have expected
the file to be opened in the editor as with pov files.
