AnimatedImage is not played automatically if a binding on sourceSize property is set and reevaluated after component creation.

Code sample:

import QtQuick

Window {
    width: 640
    height: 480
    visible: true

    AnimatedImage {
        anchors.fill: parent
        source: 'qrc:/untitled14/sample.gif'
        sourceSize: Qt.size(width / 2, height / 2)
    }
}

Steps to reproduce:
1. Build and run sample project untitled14.zip
2. Observe GIF animation

Actual result: the GIF is not playing
Expected result: the GIF is playing