Minus            1118 magick/composite.c     composite->red=gamma*Minus(p->red*Sa,Sa,q->red*Da,Da);
Minus            1119 magick/composite.c     composite->green=gamma*Minus(p->green*Sa,Sa,q->green*Da,Da);
Minus            1120 magick/composite.c     composite->blue=gamma*Minus(p->blue*Sa,Sa,q->blue*Da,Da);
Minus            1122 magick/composite.c       composite->index=gamma*Minus(p->index*Sa,Sa,q->index*Da,Da);