QML properties of type variant always get their notify signal fired even when assigning whith the same value

import Qt 4.7

Rectangle {
	width: 200
	height: 200

	property variant variantProp: 0
	property int intProp: 0

	MouseArea {
		anchors.fill: parent
		onClicked: {
			variantProp = 1;
			intProp = 1;
		}
	}

	onVariantPropChanged: {
		console.log("Variant property changed")
	}

	onIntPropChanged: {
		console.log("Int property changed")
	}
}