patch 8.2.4328: command line complete matches cleard when typing character

Problem:    Command line complete matches cleard when typing character.
            (Dominique Pellé)
Solution:   Only remove a popup menu if there is one.
diff --git a/src/version.c b/src/version.c
index 9d5fbc2..7e61af9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4328,
+/**/
     4327,
 /**/
     4326,