Fixed doxygen blocks
(cherry picked from commit 77db6ce3481ad610ee786d5ab171d5d10c1cb59d)
diff --git a/include/polarssl/aes.h b/include/polarssl/aes.h
index 80fd6d9..b85f977 100644
--- a/include/polarssl/aes.h
+++ b/include/polarssl/aes.h
@@ -134,7 +134,7 @@
                        const unsigned char *input,
                        unsigned char *output );
 
-/*
+/**
  * \brief               AES-CTR buffer encryption/decryption
  *
  * Warning: You have to keep the maximum use of your counter in mind!