patch 9.0.1792: problem with gj/gk/gM and virtual text

Problem:  Normal mode "gM", "gj", "gk" commands behave incorrectly with
          virtual text.
Solution: Use linetabsize() instead of linetabsize_str().

closes: #12909

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
diff --git a/src/version.c b/src/version.c
index 9e4e742..6d6685d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,10 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1792,
+/**/
+    1791,
+/**/
     1790,
 /**/
     1789,