added safety checks for Raw layers without a vtFeatureSet
added safety checks for Raw layers without a vtFeatureSet

seanisom/vtp,nakijun/vtp,markraz/vtp,markraz/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,seanisom/vtp