Fix "at anchor" selector not working in effects.

Assets/Cryville/Crtr/SkinPropertyKey.cs

@@ -142,7 +142,7 @@ namespace Cryville.Crtr {
 			float _time;
 			readonly PropOp _timeOp;
 			public override void ExecuteDynamic(ISkinnableGroup group, RuntimeSkinContext ctx, PdtExpression exp, IntKeyedDictionary<SkinVariable> vars, int dl) {
-				if (dl > 0) return;
+				if (dl != 1) return;
 				var psrcs = ctx.ReadContext.PropSrcs;
 				if (psrcs != null) ChartPlayer.etor.ContextCascadeInsert(psrcs);
 				ChartPlayer.etor.Evaluate(_timeOp, exp);