patch 9.1.0145: v:echospace not correct when 'showcmdloc' != last

Problem:  the amount of available space (v:echospace) on the command
          line is not correct when showcmdloc is drawn into the
          statusline or tabline.
Solution: only add SHOWCMD_COLS to the shown command column when
          'showcmdloc' is set to last (Sam-programs)

closes: #14108

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Sam-programs <130783534+Sam-programs@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/optionstr.c b/src/optionstr.c
index 7f6225f..771423c 100644
--- a/src/optionstr.c
+++ b/src/optionstr.c
@@ -3440,6 +3440,7 @@
     char *
 did_set_showcmdloc(optset_T *args UNUSED)
 {
+    comp_col();
     return did_set_opt_strings(p_sloc, p_sloc_values, FALSE);
 }