Changed some conditional INCREFs into XINCREFs.

Made some routines a little bit more robust.

in err_errno().

Also added functions (un)packrect, not in GL but needed for tv...
Commented out all the functions that cause error messages.

Changed comparison operators.

Also support '!=' and '==' as alternatives for '<>' and '='.

Fixed type error in argument of newopenfileobject.

Added getlongobjectarg.

Free config object used to get sample width.

Added splitext