patch 8.2.3225: incsearch highlighting is attempted halfway a mapping

Problem:    Incsearch highlighting is attempted halfway a mapping.
Solution:   Only do incsearch highlighting if keys were typed or there is no
            more typeahead.
diff --git a/src/version.c b/src/version.c
index 190059e..945d8e9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3225,
+/**/
     3224,
 /**/
     3223,