patch 9.0.0690: buffer size for expanding tab not correctly computed

Problem:    Buffer size for expanding tab not correctly computed.
Solution:   Correctly use size of end character.
diff --git a/src/version.c b/src/version.c
index 1d60238..37046ba 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    690,
+/**/
     689,
 /**/
     688,