}
if(!zimagedata || uncompress(imagedata, &imagedatalen, zimagedata, zimagedatalen) != Z_OK) {
- fprintf(stderr, "Couldn't uncompress %s!\n", sname);
+ fprintf(stderr, "Couldn't uncompress IDAT chunk (%d bytes) in %s!\n", imagedatalen, sname);
if(zimagedata)
free(zimagedata);
return 0;