[ANN] malloc'd ByteArrays

[Todd Fleming]

This bothers me (I don't like arbitrary limits):
  static void* memory_areas [SLATE_MEMS_MAXIMUM];
  static int memory_sizes [SLATE_MEMS_MAXIMUM];

Why not use a pointer instead of a handle? Of course this will require 
the saveActions hook, but we will need that anyway so bitmap data won't 
be lost.

Todd