patch 7.4.810
Problem:    With a sequence of commands using buffers in diff mode E749 is
            given. (itchyny)
Solution:   Skip unloaded buffer. (Hirohito Higashi)
diff --git a/src/version.c b/src/version.c
index ee2814f..7ad08d2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    810,
+/**/
     809,
 /**/
     808,