patch 9.1.0684: completion is inserted on Enter with "noselect"

Problem:  completion is inserted on Enter with "noselect"
          (Carman Fu)
Solution: check noselect before update compl_shown_match
          (glepnir)

fixes: #15526
closes: #15530

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/insexpand.c b/src/insexpand.c
index 9a8d0fa..95076b7 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -1311,7 +1311,8 @@
 		{
 		    did_find_shown_match = TRUE;
 		    max_fuzzy_score = compl->cp_score;
-		    compl_shown_match = compl;
+		    if (!compl_no_select)
+			compl_shown_match = compl;
 		}
 
 		if (!shown_match_ok && compl == compl_shown_match && !compl_no_select)