patch 8.2.4734: getcharpos() may change a mark position

Problem:    getcharpos() may change a mark position.
Solution:   Copy the mark position. (closes #10148)
diff --git a/src/version.c b/src/version.c
index cf575d1..5e026de 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4734,
+/**/
     4733,
 /**/
     4732,