updated for version 7.3.830
Problem:    :mksession confuses bytes, columns and characters when positioning
            the cursor.
Solution:   Use w_virtcol with "|" instead of w_cursor.col with "l".
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 4c4c9e9..62ae3ad 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -10829,24 +10829,24 @@
 	    {
 		if (fprintf(fd,
 			  "let s:c = %ld - ((%ld * winwidth(0) + %ld) / %ld)",
-			    (long)wp->w_cursor.col,
-			    (long)(wp->w_cursor.col - wp->w_leftcol),
+			    (long)wp->w_virtcol + 1,
+			    (long)(wp->w_virtcol - wp->w_leftcol),
 			    (long)wp->w_width / 2, (long)wp->w_width) < 0
 			|| put_eol(fd) == FAIL
 			|| put_line(fd, "if s:c > 0") == FAIL
 			|| fprintf(fd,
-			    "  exe 'normal! 0' . s:c . 'lzs' . (%ld - s:c) . 'l'",
-			    (long)wp->w_cursor.col) < 0
+			    "  exe 'normal! ' . s:c . '|zs' . %ld . '|'",
+			    (long)wp->w_virtcol + 1) < 0
 			|| put_eol(fd) == FAIL
 			|| put_line(fd, "else") == FAIL
-			|| fprintf(fd, "  normal! 0%dl", wp->w_cursor.col) < 0
+			|| fprintf(fd, "  normal! %d|", wp->w_virtcol + 1) < 0
 			|| put_eol(fd) == FAIL
 			|| put_line(fd, "endif") == FAIL)
 		    return FAIL;
 	    }
 	    else
 	    {
-		if (fprintf(fd, "normal! 0%dl", wp->w_cursor.col) < 0
+		if (fprintf(fd, "normal! 0%d|", wp->w_virtcol + 1) < 0
 			|| put_eol(fd) == FAIL)
 		    return FAIL;
 	    }