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.

src/ex_getln.c

@@ -2390,7 +2390,7 @@ cmdline_changed:
 	    trigger_cmd_autocmd(cmdline_type, EVENT_CMDLINECHANGED);
 
 #ifdef FEAT_SEARCH_EXTRA
-	if (xpc.xp_context == EXPAND_NOTHING)
+	if (xpc.xp_context == EXPAND_NOTHING && (KeyTyped || vpeekc() == NUL))
 	    may_do_incsearch_highlighting(firstc, count, &is_state);
 #endif
 

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3225,
 /**/
     3224,
 /**/