smtp: Cody tidy up of md5 digest length

Replaced the hard coded md5 digest length (16) with a preprocessor
constant

diff --git a/lib/smtp.c b/lib/smtp.c
index 08fe86f24c7d7e44197ffc6b86bd3b9bd4068ac5..45dec6a492b69a1edb6e8c97ca2f3b2db91a9487 100644 (file)
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -743,8 +743,8 @@ static CURLcode smtp_state_authcram_resp(struct connectdata *conn,
   size_t len = 0;
   char *rplyb64 = NULL;
   HMAC_context *ctxt;
-  unsigned char digest[16];
-  char reply[MAX_CURL_USER_LENGTH + 32 /* 2 * size of MD5 digest */ + 1];
+  unsigned char digest[MD5_DIGEST_LEN];
+  char reply[MAX_CURL_USER_LENGTH + 2 * MD5_DIGEST_LEN + 1];
 
   (void)instate; /* no use for this yet */