167     ulg rowbytes;  in main()  local
690         rowbytes = wpng_info.width;  in main()
692         rowbytes = wpng_info.width * 3;  in main()
694         rowbytes = wpng_info.width * 4;  in main()
709         if (wpng_info_height > ((size_t)(-1)/rowbytes ||  in main()
710             wpng_info_height > ((ulg)(-1)/rowbytes) {  in main()
717         image_bytes = rowbytes * wpng_info.height;  in main()
728             wpng_info.row_pointers[i] = wpng_info.image_data + i*rowbytes;  in main()
747         wpng_info.image_data = (uch *)malloc(rowbytes);  in main()
756             bytes = fread(wpng_info.image_data, 1, rowbytes, wpng_info.infile);  in main()
757             if (bytes != rowbytes) {  in main()
759                   ":  expected %lu bytes, got %lu bytes (row %ld)\n", rowbytes,  in main()