patch 8.1.1289: may not have enough space to add "W" to search stats

Problem:    May not have enough space to add "W" to search stats.
Solution:   Reserve a bit more space. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index fb1235c..99bfb98 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1289,
+/**/
     1288,
 /**/
     1287,