ofImages loaded via ofLoadImage don't draw

0072 Develop, OS X 10.8

which is different than image.loadImage behavior

Test case

ofImage loadImage;
ofImage image;
//--------------------------------------------------------------
void testApp::setup(){
    string imagePath = "imageTest.jpg";

    ofLoadImage(loadImage, imagePath);
    image.loadImage(imagePath);
}

//--------------------------------------------------------------
void testApp::update(){

}

//--------------------------------------------------------------
void testApp::draw(){
    loadImage.draw(0, 0);//[warning] ofGLRenderer::draw(): texture is not allocated
    image.draw(0, 0);//draws
}

首先在 OS X 10.8 上重现提供的测试用例，对比 ofLoadImage(loadImage, imagePath) 和 image.loadImage(imagePath)。跟踪为什么 loadImage.draw(0, 0) 报告纹理未分配，而 image.draw(0, 0) 却成功；当两条加载路径都能在没有警告的情况下绘制图像时即完成。