patch 8.0.1285: occasional crash when using a channel

Problem:    Occasional crash when using a channel. (Marek)
Solution:   Decrement reference count later. (closes #2315)
diff --git a/Filelist b/Filelist
index 56962c8..7083eed 100644
--- a/Filelist
+++ b/Filelist
@@ -659,6 +659,7 @@
 		runtime/makemenu.vim \
 		runtime/autoload/*.vim \
 		runtime/autoload/README.txt \
+		runtime/autoload/dist/*.vim \
 		runtime/autoload/xml/*.vim \
 		runtime/colors/*.vim \
 		runtime/colors/README.txt \