change behavior of gmalloc in case where user tries to gmalloc 0 bytes   to a) not attempt the malloc and b) return an invalid pointer (1) so   that the user will crash when trying to use of free the pointer.
change behavior of gmalloc in case where user tries to gmalloc 0 bytes
  to a) not attempt the malloc and b) return an invalid pointer (1) so
  that the user will crash when trying to use of free the pointer.

  b) might have been accomplished before, but the malloc was done anyway.

pixelglow/graphviz,kbrock/graphviz,kbrock/graphviz,tkelman/graphviz,BMJHayward/graphviz,jho1965us/graphviz,kbrock/graphviz,kbrock/graphviz,MjAbuz/graphviz,kbrock/graphviz,MjAbuz/graphviz,pixelglow/graphviz,kbrock/graphviz,pixelglow/graphviz,ellson/graphviz,jho1965us/graphviz,tkelman/graphviz,ellson/graphviz,ellson/graphviz,kbrock/graphviz,jho1965us/graphviz,kbrock/graphviz,ellson/graphviz,tkelman/graphviz,jho1965us/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,ellson/graphviz,MjAbuz/graphviz,ellson/graphviz,tkelman/graphviz,ellson/graphviz,jho1965us/graphviz,jho1965us/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,tkelman/graphviz,BMJHayward/graphviz,pixelglow/graphviz,pixelglow/graphviz,jho1965us/graphviz,BMJHayward/graphviz,pixelglow/graphviz,ellson/graphviz,jho1965us/graphviz,BMJHayward/graphviz,kbrock/graphviz,tkelman/graphviz,jho1965us/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,tkelman/graphviz,tkelman/graphviz,pixelglow/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,ellson/graphviz,jho1965us/graphviz,MjAbuz/graphviz,ellson/graphviz,jho1965us/graphviz,pixelglow/graphviz,pixelglow/graphviz,tkelman/graphviz,tkelman/graphviz,kbrock/graphviz,tkelman/graphviz,kbrock/graphviz,pixelglow/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,ellson/graphviz,pixelglow/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,MjAbuz/graphviz