pywrap: common.i: Change the exception to OSError.
pywrap: common.i: Change the exception to OSError.

Which is more suitable for errno related errors.

gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim