patch 9.1.0524: the recursive parameter in the *_equal functions can be removed

Problem:  the recursive parameter in the *_equal functions can be removed
Solution: Remove the recursive parameter in dict_equal(), list_equal()
          object_equal and tv_equal(). Use a comparison of the static
          var recursive_cnt == 0 to determine whether or not tv_equal()
          has been called recursively (Yinzuo Jiang).

closes: #15070

Signed-off-by: Yinzuo Jiang <jiangyinzuo@foxmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testing.c b/src/testing.c
index 3e9e077..18b8e78 100644
--- a/src/testing.c
+++ b/src/testing.c
@@ -187,7 +187,7 @@
 		{
 		    item2 = dict_find(got_d, hi->hi_key, -1);
 		    if (item2 == NULL || !tv_equal(&HI2DI(hi)->di_tv,
-						  &item2->di_tv, FALSE, FALSE))
+						  &item2->di_tv, FALSE))
 		    {
 			// item of exp_d not present in got_d or values differ.
 			dict_add_tv(exp_tv->vval.v_dict,
@@ -262,7 +262,7 @@
 {
     garray_T	ga;
 
-    if (tv_equal(&argvars[0], &argvars[1], FALSE, FALSE)
+    if (tv_equal(&argvars[0], &argvars[1], FALSE)
 						   != (atype == ASSERT_EQUAL))
     {
 	prepare_assert_error(&ga);