Hooked in GKW's Java port of the GLU library's mipmap and image

scaling operations. Added new ForceProcAddressGen directive to GlueGen
to force the addresses of the C routines to be fetched even though the
functions were being ignored by the core JavaEmitter. Cut down on the
number of variants of gluScaleImage and associated routines. Changed
the Java signatures of the affected methods to take Buffer again
instead of ByteBuffer (as was done during prototyping) to attempt to
maintain binary compatibility with current JOGL programs. Fixed bug /
problem in gluScaleImage implementation where incorrect scaling of
pixel values was being applied in Image.empty_image(); there may be
additional problems here for other pixel types. Put debugging code in
BuildMipmap under jogl.debug.BuildMipmap System property.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@215 232f8b59-042b-4e1e-8c03-345bb8c30851

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