patch 9.0.1089: unnessary assignment

Problem:    unnessary assignment
Solution:   Remove the assignment. (Luuk van Baal, closes #1136)
diff --git a/src/version.c b/src/version.c
index a7fd8d8..71029ae 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1089,
+/**/
     1088,
 /**/
     1087,