fix type alias AutoMigrate bug. eg

```go
package main

type IDer interface{ GetID() int64 }

// ID will add some method to implement some interface eg: GetID
type ID int64
func (z ID) GetID() int64 { return int64(z) }

type Test struct {
	ID
	Code string `gorm:"size:50"`
	Name string `gorm:"size:50"`
}

func main() {
	db, err := gorm.Open(postgres.New(postgres.Config{
		DSN:                  `dsn`,
		PreferSimpleProtocol: false,
	}), &gorm.Config{
		Logger:                 logger.Default.LogMode(logger.Info),
		SkipDefaultTransaction: true,
	})
	if err != nil {
		log.Fatal(err)
	}

	if err = db.AutoMigrate(&Test{}); err != nil {
		// invalid embedded struct for Test's field ID, should be struct, but got main.ID
		log.Fatal(err)
	}
}
```

schema/field.go

@@ -398,7 +398,8 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
 					ef.TagSettings[k] = v
 				}
 			}
-		case reflect.Invalid, reflect.Uintptr, reflect.Array, reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice, reflect.UnsafePointer:
+		case reflect.Invalid, reflect.Uintptr, reflect.Array, reflect.Chan,          reflect.Func,      reflect.Interface,
+		     reflect.Map,     reflect.Ptr,     reflect.Slice, reflect.UnsafePointer, reflect.Complex64, reflect.Complex128:
 			schema.err = fmt.Errorf("invalid embedded struct for %s's field %s, should be struct, but got %v", field.Schema.Name, field.Name, field.FieldType)
 		}
 	}