Fix Place/BreakLine breaking with length 0

src/Items/CreativeBuilding.cs

@@ -115,7 +115,7 @@ public class CreativeBuilding : Node2D
 
         // TODO: Make sure position is a reasonable distance away.
         if (!Enum.IsDefined(typeof(Facing), direction)) return;
-        if ((length < 1) || (length > MaxLength)) return;
+        if ((length < 0) || (length > MaxLength)) return;
 
         // TODO: Test if starting block is valid.
         // FIXME: Test if there is a player in the way.
@@ -136,7 +136,7 @@ public class CreativeBuilding : Node2D
 
         // TODO: Make sure position is a reasonable distance away.
         if (!Enum.IsDefined(typeof(Facing), direction)) return;
-        if ((length < 1) || (length > MaxLength)) return;
+        if ((length < 0) || (length > MaxLength)) return;
 
         var start = new BlockPos(x, y);
         var world = this.GetWorld();