cgen: fix in array of struct error (fix #7452) (#7463)

vlib/builtin/array_test.v

@@ -1195,3 +1195,34 @@ fn test_any_type_array_contains() {
 	assert [2] in c
 	assert [3] !in c
 }
+
+struct Person {
+	name string
+	nums []int
+	kv   map[string]string
+}
+
+fn test_struct_array_of_multi_type_in() {
+	ivan := Person{
+		name: 'ivan'
+		nums: [1, 2, 3]
+		kv: {
+			'aaa': '111'
+		}
+	}
+	people := [Person{
+		name: 'ivan'
+		nums: [1, 2, 3]
+		kv: {
+			'aaa': '111'
+		}
+	}, Person{
+		name: 'bob'
+		nums: [2]
+		kv: {
+			'bbb': '222'
+		}
+	}]
+	println(ivan in people)
+	assert ivan in people
+}