AcquireBlock      464 magick/memory.c   memory=AcquireBlock(size == 0 ? 1UL : size);
AcquireBlock      468 magick/memory.c         memory=AcquireBlock(size == 0 ? 1UL : size);
AcquireBlock     1073 magick/memory.c     return(AcquireBlock(size));
AcquireBlock     1074 magick/memory.c   memory=AcquireBlock(size);