patch 9.0.0863: col() and charcol() only work for the current window

Problem:    col() and charcol() only work for the current window.
Solution:   Add an optional winid argument. (Yegappan Lakshmanan,
            closes #11466, closes #11461)
diff --git a/src/version.c b/src/version.c
index 8e97025..64ed648 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    863,
+/**/
     862,
 /**/
     861,