Fixed: variable indices were incorrect in nested scopes.

ast/nodes.flow.cs

@@ -114,7 +114,7 @@ namespace arookas
 
 		public override void Compile(sunContext context)
 		{
-			context.Scopes.Push();
+			context.Scopes.Push(context.Scopes.Top.Type);
 			context.Loops.Push(IsNamed ? NameLabel.Label.Value : null);
 			TryCompile(Declaration, context);
 			var bodyPrologue = context.Text.OpenPoint();

ast/nodes.statements.cs

@@ -10,7 +10,7 @@
 
 		public override void Compile(sunContext context)
 		{
-			context.Scopes.Push();
+			context.Scopes.Push(context.Scopes.Top.Type);
 			base.Compile(context);
 			context.Scopes.Pop();
 		}