$OpenBSD: patch-src_gdl_c,v 1.3 2008/08/25 15:14:43 jasper Exp $
--- src/gdl.c.orig	Thu Aug 21 21:26:23 2008
+++ src/gdl.c	Thu Aug 21 21:26:58 2008
@@ -748,7 +748,7 @@ static int append_this_range_entry_to_file(FILE *f, un
 		}
 		if(have!=want)
 		{
-			a=ENODATA;			/* set the error message to "no data available */
+			a=EIO;			/* set the error message to "Input/output error" */
 			break;
 		}