[elpa] externals/diff-hl d225def: Check that diff-hl-show-hunk-diff-buffer-name exists first

[ELPA Syncer]

branch: externals/diff-hl
commit d225def4a473a16ac994124e063695ef9cef3308
Author: Dmitry Gutov <dgutov@yandex.ru>
Commit: Dmitry Gutov <dgutov@yandex.ru>

    Check that diff-hl-show-hunk-diff-buffer-name exists first
    
    #167
---
 diff-hl-show-hunk.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/diff-hl-show-hunk.el b/diff-hl-show-hunk.el
index ee047bf..6e3e63b 100644
--- a/diff-hl-show-hunk.el
+++ b/diff-hl-show-hunk.el
@@ -109,7 +109,8 @@ corresponding to the clicked line in the original buffer."
     (read-only-mode -1)
     (erase-buffer))
   (bury-buffer diff-hl-show-hunk-buffer-name)
-  (bury-buffer diff-hl-show-hunk-diff-buffer-name)
+  (when (get-buffer diff-hl-show-hunk-diff-buffer-name)
+    (bury-buffer diff-hl-show-hunk-diff-buffer-name))
   (when diff-hl-show-hunk--hide-function
     (let ((hidefunc diff-hl-show-hunk--hide-function))
       (setq diff-hl-show-hunk--hide-function nil)