--- gd-2.0.30/testtr.c	2004-10-27 13:01:03.000000000 -0400
+++ gd-2.0.30.fixed/testtr.c	2004-10-31 20:33:49.621525120 -0500
@@ -37,9 +37,13 @@
 
 	gdImageSaveAlpha (im, TRUE);
 
+#ifdef HAVE_LIBPNG
 	out = fopen ("testtr.png", "wb");
 	gdImagePng (im, out);
 	fclose (out);
+#else
+	fprintf(stderr, "Compiled without png support\n");
+#endif
 
 	gdImageDestroy (im);