fixed incredibly long-standing bug: bin index array was allocated for 3 instead of 4 unsigned ints; don't understand how any of the scale-space code every worked correctly!
fixed incredibly long-standing bug: bin index array was allocated for 3 instead of 4 unsigned ints; don't understand how any of the scale-space code every worked correctly!

git-svn-id: 9e9401559e51101c165cdce4d49b411eb20436ed@4440 3d70eeeb-363e-0410-a505-8a46323a89f2

Slicer/teem,Slicer/teem,BRAINSia/teem,BRAINSia/teem,Slicer/teem,Slicer/teem,BRAINSia/teem,BRAINSia/teem,Slicer/teem,BRAINSia/teem