patch 8.0.1561: crash with rust syntax highligting

Problem:    Crash with rust syntax highligting. (Edd Barrett)
Solution:   Avoid going past the end of an empty line.
diff --git a/src/version.c b/src/version.c
index f8777dc..ae51d72 100644
--- a/src/version.c
+++ b/src/version.c
@@ -779,6 +779,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1561,
+/**/
     1560,
 /**/
     1559,