[glib/mcatanzaro/string-test] tests: Add missing return value check in string test

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 82d162da8374c834cbb1c0cd80244b7905986327
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue May 11 16:24:39 2021 -0500

    tests: Add missing return value check in string test
    
    Coverity noticed that we were not testing the return value here. Good
    Coverity!

 glib/tests/string.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/glib/tests/string.c b/glib/tests/string.c
index 819b192fb..6e22cd287 100644
--- a/glib/tests/string.c
+++ b/glib/tests/string.c
@@ -519,6 +519,7 @@ test_string_replace (void)
   n = g_string_replace (s, "a", "abcdefghijkl", 0);
   g_assert_cmpstr 
("abcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijkl",
                    ==, s->str);
+  g_assert_cmpint (n, ==, 8);
 
   g_string_free (s, TRUE);
 }