Fix error code in dhm_selftest()
diff --git a/library/dhm.c b/library/dhm.c
index 9d00d9b..8bc9f0e 100644
--- a/library/dhm.c
+++ b/library/dhm.c
@@ -567,8 +567,10 @@
 
     return( 0 );
 #else
-    ((void) verbose);
-    return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE );
+    if( verbose != 0 )
+        polarssl_printf( "  DHM parameter load: skipped\n" );
+
+    return( 0 );
 #endif
 }