hist2d            153 jquant2.c      typedef hist2d * hist3d;	/* type for top-level pointer */
hist2d           1264 jquant2.c          ((j_common_ptr) cinfo, JPOOL_IMAGE, HIST_C0_ELEMS * SIZEOF(hist2d));
hist2d           1266 jquant2.c          cquantize->histogram[i] = (hist2d) (*cinfo->mem->alloc_large)