Answered Query Built from xPDO Criteria Adds Error-Producing "( AND" in WHERE Clause

$c = $modx->newQuery('modTemplateVar','modTemplateVar');
$c->select('modMediaSource.properties');
$c->leftJoin('modMediaSource','modMediaSource','modMediaSource.id = modTemplateVar.source');
$c->where(array(
	'modTemplateVar.name'=>'item-image'
));
$props = $modx->getCollection('modTemplateVar',$c);

SELECT modMediaSource.properties 
FROM `site_tmplvars` AS `modTemplateVar` 
LEFT JOIN `media_sources` `modMediaSource` ON modMediaSource.id = modTemplateVar.source 
WHERE  ( AND `modTemplateVar`.`name` = 'item-image' ) 

$c = $modx->newQuery('modTemplateVar','modTemplateVar');

$c = $modx->newQuery('modTemplateVar');

SELECT MediaSource.properties
FROM `media_sources` AS `MediaSource`
LEFT JOIN  `site_tmplvars` AS `modTemplateVar` ON MediaSource.id = modTemplateVar.source
WHERE `modTemplateVar`.`name` = 'item-image'

if(!function_exists('cfGetImageBaseByTvName')){
	function cfGetImageBaseByTvName($tvname,$rootrelative=false,$property='baseUrl',$context='web') {
		global $modx;
		$imagebase = '';
		$tv = $modx->getObject('modTemplateVar', array('name' => $tvname));
		if(!empty($tv)){
			$imagebase = $tv->getSource($context,false)->get('properties')[$property]['value'];
			if(!empty($imagebase)){
				$imagebase = $rootrelative ? '/'.str_replace('//', '/', $imagebase) : trim($imagebase,'/') ;
			} 
		} else {
			$msg = 'Can not get object for tv named "'.$tvname.'". Look for typos in the tv name passed to this function.';
			$modx->log(modX::LOG_LEVEL_ERROR, $msg,'','cfGetImageBaseByTvName',__FILE__,__LINE__);
		}
		return $imagebase;
	}
}