updated for version 7.4.509
Problem:    Users are not aware their encryption is weak.
Solution:   Give a warning when prompting for the key.
diff --git a/src/main.c b/src/main.c
index fe75495..1814385 100644
--- a/src/main.c
+++ b/src/main.c
@@ -854,6 +854,7 @@
 #ifdef FEAT_CRYPT
     if (params.ask_for_key)
     {
+	crypt_check_current_method();
 	(void)crypt_get_key(TRUE, TRUE);
 	TIME_MSG("getting crypt key");
     }