[ptx] Hugin stitching problem

[Peter Gawthrop]

Hi Pablo,

 not sure if this is me doing something wrong or a hugin
 problem. Doing my usual stitch of 8 full-frame fisheye

  http://www.lightspacewater.net/Tutorials/PhotoPano2/paper/

 I get a really accurate stitch except that the right and the bottom of
 the rectilinear image have empty space. For example, 

 a 1000x500 tif contains a 994x494 image, the 6 pixels to the right
 and to the bottom are empty.

 a 3000x1500 tif contains a 2983x1483 image, the 17 pixels to the right
 and to the bottom are empty.
 
 This space is also visible in the preview window.

 Looking at the cropped image in pteditor shows a discontinuity in
 place of the gap --  there appear to be missing pixels.

 Any ideas?

 Peter.