CutyCapt proceeds even if file does not exist

[mcp292]

If the url path is wrong, particularly to a local file (i.e. CutyCapt --url=~/wrong/path... instead of CutyCapt --url=file:///home/usr/path...), CutyCapt takes a long time and then spits out a blank file.

This is my first time using this program. It took me a very long time to track down that the problem was my specifying the file incorrectly.