patch 8.0.1361: some users don't want to diff with hidden buffers

Problem:    Some users don't want to diff with hidden buffers.
Solution:   Add the "hiddenoff" item to 'diffopt'. (Alisue, closes #2394)
diff --git a/src/version.c b/src/version.c
index ece615c..604fa41 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1361,
+/**/
     1360,
 /**/
     1359,