nalpha            190 ext/gd/libgd/webpng.c 			int maxx, maxy, x, y, alpha, pix, nalpha = 0;
nalpha            210 ext/gd/libgd/webpng.c 							nalpha++;
nalpha            219 ext/gd/libgd/webpng.c 			printf("%d alpha channels\n", nalpha);