patch 9.1.0446: getregionpos() inconsistent for partly-selected multibyte char

Problem:  getregionpos() behaves inconsistently for a partly-selected
          multibyte char.
Solution: Always use column of the first byte for a partly-selected
          multibyte char (zeertzjq).

closes: #14851

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index ae37647..ac0bda0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    446,
+/**/
     445,
 /**/
     444,