Error in verbose mode when argv[0] is not an actual path

[blattersturm]

If running plain cppwinrt -v from a console with the Windows SDK in PATH I get the following error:

cppwinrt : error canonical: The system cannot find the file specified.: "cppwinrt.exe"

It seems the following line expects argv[0] to be an actual path to cppwinrt.exe without the .exe specified, which is not necessarily the case (e.g. when running from PATH, but also for example on non-Windows platforms with symlinks or certain kinds of exec being used):

cppwinrt/cppwinrt/main.cpp

Lines 269 to 271 in e192094

	if (settings.verbose)
	{
	w.write(" tool: %\n", canonical(path(argv[0]).replace_extension("exe")).string());

[kennykerr]

Good catch. Feel free to contribute a fix, otherwise I'll get to it as soon as possible.

[triplef]

Running into this as well whenever requesting verbose output while using cppwinrt.exe from Visual Studio in my PATH.