update Changelog

Changelog

@@ -1,3 +1,8 @@
+2014-06-05 Tom Callaway <spot@fedoraproject.org>
+	* lib/snprintf.c: update to newer version from LPRng. The old version is
+	licensed under the Artistic License 1.0 which isn't compatible with the
+	GPL and arguably non-free.
+
 2010-05-24 m. allan noah <kitno455 at gmail dot com>
 	* src/preview.c, src/scanadf.c, src/xcam.c, src/xscanimage.c:
 	- hide SANE_STATUS_WARMING_UP, patch by Ilmars Poikans