[ptx] Updated patch for Enblend - Bug with 360 deg Panorama is a Nona bug

[Ian Sydenham]

Mike Runge wrote:
>> it has a problem with enblend parameter "-w" (blending over 360 deg).
>> Please have a look at this 2 mov-files (created with panocube). The pano
>> isn't finished, just look for the visble vertical stitch edge at 
>> -180/+180

I have duplicated this bug when stitching a 360 deg Panorama. On closer 
investigation the problem appears to be with Nona, and not with enblend.
Stitching using Nona multiple Tiff creates an image that is one pixel column 
wider than the image created using PTStitcher. The pixel column is at the far 
right hand side of the image and is clear (when opened in GIMP), but shows up as 
a black line in the TIFF file created by enblend. Removing the one column in the 
image created by enblend, or in the Nona-created multiple Tiff image, fixes the 
problem.

The correct solution would be to modify Nona so that it does NOT create a 
multiple tiff image that has an extra column of pixels.

regards,

Ian Sydenham