[Partial fix for bug #883332] Fixed bug with the argument processing code that could result in a blank document not being created if the "-psn_" parameter was the only argument.
[Partial fix for bug #883332] Fixed bug with the argument processing code that could result in a blank document not being created if the "-psn_" parameter was the only argument.

PintaProject/Pinta,Mailaender/Pinta,Fenex/Pinta,PintaProject/Pinta,PintaProject/Pinta,jakeclawson/Pinta,jakeclawson/Pinta,Fenex/Pinta,Mailaender/Pinta