From 4a8c2cfc56b9affc36934aa0f20d8cfd2b1511c8 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 19 Dec 2015 15:28:18 +0100
Subject: [PATCH] patch 7.4.979 Problem:    When changing the crypt key the
 blocks read from disk are not             decrypted. Solution:   Also call
 ml_decrypt_data() when mf_old_key is set. (Ken Takata)

---
 src/memfile.c | 5 +++--
 src/version.c | 2 ++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/memfile.c b/src/memfile.c
index a21b7076ae..5b13d510ea 100644
--- a/src/memfile.c
+++ b/src/memfile.c
@@ -1032,8 +1032,9 @@ mf_read(mfp, hp)
     }
 
 #ifdef FEAT_CRYPT
-    /* Decrypt if 'key' is set and this is a data block. */
-    if (*mfp->mf_buffer->b_p_key != NUL)
+    /* Decrypt if 'key' is set and this is a data block. And when changing the
+     * key. */
+    if (*mfp->mf_buffer->b_p_key != NUL || mfp->mf_old_key != NULL)
 	ml_decrypt_data(mfp, hp->bh_data, offset, size);
 #endif
 
diff --git a/src/version.c b/src/version.c
index f1bf8733e4..f949e64273 100644
--- a/src/version.c
+++ b/src/version.c
@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    979,
 /**/
     978,
 /**/