From valeriy:

o TASImage.h, TASImage.cxx, TImage.h
  new method was introduced GetVecArray  
  Returns a pointer to internal array[width x height] of double values [0, 1]
  This array is directly accessible. That allows to manipulate/change the image.

o TASImage::GetArray
  Fix to return correct array (previously it was truncated when 
  x, y shift position were not zeros).

o TASImage::GetPolygonSpans
  Fix segv when producing images from some Rene's macro.

o fix segv. when image is drawn in canvas and canvas resized.

o TAttImage.cxx
  For "Pretty Palette with a Spectrum Violet->Red" set 
  white color to zeros.


git-svn-id: http://root.cern.ch/svn/root/trunk@20500 27541ba8-7e3a-0410-8455-c3a389f83636