patch 9.0.1617: charidx() result is not consistent with byteidx()
Problem: charidx() and utf16idx() result is not consistent with byteidx().
Solution: When the index is equal to the length of the text return the
lenght of the text instead of -1. (Yegappan Lakshmanan,
closes #12503)
diff --git a/src/version.c b/src/version.c
index e6858c2..a3fc959 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 1617,
+/**/
1616,
/**/
1615,