ZeroCrossing     1535 magick/segment.c   ZeroCrossing
ZeroCrossing     1549 magick/segment.c   zero_crossing=(ZeroCrossing *) AcquireQuantumMemory((size_t) count,
ZeroCrossing     1551 magick/segment.c   if (zero_crossing == (ZeroCrossing *) NULL)
ZeroCrossing     1680 magick/segment.c   zero_crossing=(ZeroCrossing *) RelinquishMagickMemory(zero_crossing);