Add some corrections based on code review
-Add the DHM_ALT in an alphabetical order
-Close correctly the 'extern "C" { ...'
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index f8594b8..2aa4686 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -267,6 +267,7 @@
 //#define MBEDTLS_BLOWFISH_ALT
 //#define MBEDTLS_CAMELLIA_ALT
 //#define MBEDTLS_DES_ALT
+//#define MBEDTLS_DHM_ALT
 //#define MBEDTLS_XTEA_ALT
 //#define MBEDTLS_MD2_ALT
 //#define MBEDTLS_MD4_ALT
@@ -275,7 +276,7 @@
 //#define MBEDTLS_SHA1_ALT
 //#define MBEDTLS_SHA256_ALT
 //#define MBEDTLS_SHA512_ALT
-//#define MBEDTLS_DHM_ALT
+
 
 /*
  * When replacing the elliptic curve module, pleace consider, that it is
diff --git a/include/mbedtls/dhm.h b/include/mbedtls/dhm.h
index 40916c6..f9725ab 100644
--- a/include/mbedtls/dhm.h
+++ b/include/mbedtls/dhm.h
@@ -296,10 +296,19 @@
 int mbedtls_dhm_parse_dhmfile( mbedtls_dhm_context *dhm, const char *path );
 #endif /* MBEDTLS_FS_IO */
 #endif /* MBEDTLS_ASN1_PARSE_C */
-#else
+
+#ifdef __cplusplus
+}
+#endif
+
+#else /* MBEDTLS_DHM_ALT */
 #include "dhm_alt.h"
 #endif /* MBEDTLS_DHM_ALT */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Checkup routine
  *