`SaveWindowAttributes' namespace, the symbol existed in another namespace, and
the compiler picked up the one we didn't want.  This went unnoticed for a long
while because it (happened) to choose PPM for an image format, so the user
still got an image which would display.
The recent addition of the POVRAY format brought the bug to light however, as
we can't dump an image to a POVRAY file (only a dataset).

This also sets `useLZW' to 0; there were patent issues with the LZW
compression, and the writer was bailing out because it could not (legally)
compress the image.


git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@1633 18c085ea-50e0-402c-830e-de6fd14e8384