Validations missing in toXML_low

[guillaumefortin]

2 validations are missing in toXML_low():

private function toXML_low($template,$txnType)
{
	$xmlString = "";
	//FIX: This line should be added.
	if( !empty($this->level3data[$txnType]) && is_array($this->level3data[$txnType]) )
	{
		for($x=0;$x<count($this->level3data[$txnType]);$x++)
		{
			if($x>0)
			{
				$xmlString .="</$txnType><$txnType>";
			}
			$keys=array_keys($template);
			for($i=0; $i < count($keys);$i++)
			{
				$tag=$keys[$i];

				if(is_array($template[$keys[$i]]))
				{
					$data=$template[$tag];

					//FIX: should add !is_array
					if( !is_array($this->level3data[$tag]) || !count($this->level3data[$tag]) )
					{
						continue;
					}
					$beginTag="<$tag>";
					$endTag="</$tag>";