BUG: Find _correct_ static file source when save_as=''
BUG: Find _correct_ static file source when save_as=''

    content_obj.get_url_setting('save_as')

can be empty string in some cases, such as pelican:

    EXTRA_PATH_METADATA = {
        # Copy files from directory 'static' to toplevel
		'static': {'path': ''},
	}

whiskyechobravo/image_process