patch 8.0.1286: occasional crash when using a channel

Problem:    Occasional crash when using a channel. (Marek)
Solution:   Decrement reference count later. (closes #2315)
diff --git a/src/version.c b/src/version.c
index 8dd7230..4368138 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1286,
+/**/
     1285,
 /**/
     1284,