#4 segfaults when passing arguments from command line

[failsure]

GUatu 0.872

When passing any command line arguments except for
files to GUatu 0.872, the application segfaults instead
of just dropping the arguments and starting normally,
or giving a list of supported arguments and returning
to the prompt.

Invalid files are ignored (no "hang") but error
messages are printed on the console.

ex:

andreww@l-andreww:~$ GUatu/src/guatu --help
--help
Using texture size 512x512
Segmentation fault