Don't pass through characters with codes < 16.

svn path=/trunk/; revision=3538

1 files changed, 1 insertions, 1 deletions

diff --git a/unmime.c b/unmime.c
index 3e2ec521..d7882fa0 100644
--- a/unmime.c
+++ b/unmime.c
@@ -30,7 +30,7 @@ static unsigned char unhex(unsigned char c)
   else if ((c >= 'a') && (c <= 'f'))
     return (c - 'a' + 10);
   else
-    return c;
+      return 16;	/* invalid hex character */
 }
 
 static int qp_char(unsigned char c1, unsigned char c2, unsigned char *c_out)