patch 8.1.2280: crash when passing partial to substitute()

Problem:    Crash when passing partial to substitute().
Solution:   Take extra arguments into account. (closes #5186)
diff --git a/src/version.c b/src/version.c
index a38d335..2d79cbe 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2280,
+/**/
     2279,
 /**/
     2278,