Make Canvas respect smooth: true/false

Change-Id: I6e68fcfc534aca139484a9b2970e61fb22688c58
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>

src/quick/items/context2d/qquickcontext2dtexture.cpp

@@ -586,6 +586,7 @@ QQuickCanvasItem::RenderTarget QQuickContext2DImageTexture::renderTarget() const
 void QQuickContext2DImageTexture::bind()
 {
     imageTexture()->bind();
+    updateBindOptions();
 }
 
 bool QQuickContext2DImageTexture::updateTexture()