Handle missing : in write_one_header debug statement. Closes #3483

diff --git a/sendlib.c b/sendlib.c
index 8297ad5d9ac18d3cc28b0fc1934506729b7dad6a..95d623308322233e3569a4b9b08f0f6576d62215 100644 (file)
--- a/sendlib.c
+++ b/sendlib.c
@@ -1799,7 +1799,7 @@ static int write_one_header (FILE *fp, int pfxw, int max, int wraplen,
   else
   {
     t = strchr (start, ':');
-    if (t > end)
+    if (!t || t > end)
     {
       dprint (1, (debugfile, "mwoh: warning: header not in "
                  "'key: value' format!\n"));