tests: Fix some memory leaks

tests-clar/checkout/tree.c

@@ -67,6 +67,9 @@ void test_checkout_tree__can_checkout_and_remove_directory(void)
 	cl_assert_equal_i(true, git_path_isfile("./testrepo/ab/de/2.txt"));
 	cl_assert_equal_i(true, git_path_isfile("./testrepo/ab/de/fgh/1.txt"));
 
+	git_object_free(g_object);
+	g_object = NULL;
+
 	/* Checkout brach "master" and update HEAD, so that HEAD matches the
 	 * current working tree
 	 */
@@ -136,6 +139,9 @@ void test_checkout_tree__doesnt_write_unrequested_files_to_worktree(void)
   opts.checkout_strategy = GIT_CHECKOUT_NONE;
   git_checkout_tree(g_repo, (git_object*)p_chomped_commit, &opts);
   cl_assert_equal_i(false, git_path_isfile("testrepo/readme.txt"));
+
+  git_commit_free(p_master_commit);
+  git_commit_free(p_chomped_commit);
 }
 
 void test_checkout_tree__can_switch_branches(void)

tests-clar/clone/nonetwork.c

@@ -144,6 +144,8 @@ void test_clone_nonetwork__custom_autotag(void)
 
 	cl_git_pass(git_tag_list(&tags, g_repo));
 	cl_assert_equal_i(0, tags.count);
+
+	git_strarray_free(&tags);
 }
 
 void test_clone_nonetwork__cope_with_already_existing_directory(void)

tests-clar/config/backend.c

@@ -18,4 +18,6 @@ void test_config_backend__checks_version(void)
 	cl_git_fail(git_config_add_backend(cfg, &backend, 0, false));
 	err = giterr_last();
 	cl_assert_equal_i(GITERR_INVALID, err->klass);
+
+	git_config_free(cfg);
 }