+without this patch mutt crashes if any option that contains charset is set to
+empty, see upstream bug http://bugs.mutt.org/3326
+
--- a/init.c
+++ b/init.c
-@@ -1751,6 +1751,9 @@
+@@ -1732,6 +1732,9 @@
char *p, *q = NULL, *s = safe_strdup (val);
int rc = 0, strict = strcmp (opt->option, "send_charset") == 0;