Description of problem:
hp-sendfax complains about low supplies when faxing, which is bogus because it
doesn't take any supplies to send a fax.

Version-Release number of selected component (if applicable):
hplip-1.7.2-3.fc6

How reproducible:
Always

Steps to Reproduce:
1. start with low supplies
2. attempt to send fax
3.
  
Actual results:
Transfering fax data...
error: Device is busy or in an error state (code=102). Please wait for the
device to become idle or clear the error and try again.

Expected results:
Send fax.

Additional info:
Patch attached.  It's a little hackish because there is no easy fix with the
current organization of error codes in the codebase.  Fortunately, it's small
and unobtrusive.

Original upstream report here:
http://article.gmane.org/gmane.comp.printing.hplip.devel/388