patch 8.1.1350: "W" for wrapping not shown when more than 99 matches

Problem:    "W" for wrapping not shown when more than 99 matches.
Solution:   Adjust check for length. (Masato Nishihata, closes #4388)
diff --git a/src/search.c b/src/search.c
index d9b6a7c..56bd763 100644
--- a/src/search.c
+++ b/src/search.c
@@ -5012,7 +5012,7 @@
 	}
 
 	len = STRLEN(t);
-	if (show_top_bot_msg && len + 3 < SEARCH_STAT_BUF_LEN)
+	if (show_top_bot_msg && len + 2 < SEARCH_STAT_BUF_LEN)
 	{
 	    STRCPY(t + len, " W");
 	    len += 2;