cosmetic: fix typo in comment

Change-Id: I5a384985ef54234e915bf6334125f8d087988d1d
diff --git a/src/gsm_rlcmac.c b/src/gsm_rlcmac.c
index 9b8782d..c56526e 100644
--- a/src/gsm_rlcmac.c
+++ b/src/gsm_rlcmac.c
@@ -5832,7 +5832,7 @@
     LOGP(DRLCMACDATA, LOGL_NOTICE, "Payload Type: RESERVED (3)\n");
     return CSN_ERROR_GENERAL;
   }
-  /* We can decode the message */
+  /* We can encode the message */
   else
   {
     /* First print the message type and create a tree item */