compiler: multiple returns - add test & fix use with array/map

compiler/tests/fn_multiple_returns_test.v

@@ -0,0 +1,19 @@
+struct UserData {
+	test string
+}
+
+fn test_fn_multiple_returns() {
+	name, age, groups, data := fn_mr_get_user()
+	assert name == 'joe'
+	assert age == 34
+	assert groups[0] == 'admins' 
+	assert groups[1] == 'users'
+	assert data.test == 'Test Data'
+	println('name: $name | age: $age | groups: ' + groups.join(',') + ' | data: $data.test')
+}
+
+fn fn_mr_get_user() (string, int, []string, UserData) {
+	groups := ['admins', 'users']
+	data := UserData{test: 'Test Data'}
+	return 'joe',34,groups,data
+}