Carrying over RasterFloatGraphics changes that were identified and solved in
Blockout code, having to do with RasterFloatPixBuff.getWidth() and
RasterFloatPixBuff.getHeight() calls, in the seldom used constructor. This is
a one line code correctness change that leaves everything else intact,
including copyright notices and dates. It was a major bug, if used in that
way, with the RasterFloatPixBuff object.
