drawLegend() and drawScalebar()

[Zolla Michalak]

I'm getting a segmentation fault for both drawLegend() and drawScalebar().

My code is:

$legendImg = $map->drawLegend();
$scalebarImg = $map->drawScalebar(); 

Should these methods work on thier own, or do I need to call something
else first like drawLabelCache(image)? ($map is a working mapObj)

-zm