patch 8.1.2173: searchit() has too many arguments

Problem:    Searchit() has too many arguments.
Solution:   Move optional arguments to a struct.  Add the "wrapped" argument.
diff --git a/src/spell.c b/src/spell.c
index 04e4af6..4620907 100644
--- a/src/spell.c
+++ b/src/spell.c
@@ -2861,7 +2861,7 @@
     curwin->w_cursor.lnum = 0;
     while (!got_int)
     {
-	if (do_search(NULL, '/', frompat, 1L, SEARCH_KEEP, NULL, NULL) == 0
+	if (do_search(NULL, '/', frompat, 1L, SEARCH_KEEP, NULL) == 0
 						   || u_save_cursor() == FAIL)
 	    break;