[EO 3.0] Simple map drawing optimalization

[Qazek]

Sorry for english

This simple fix just stop rendering empty map tile slots. It's really helpfull when you using big maps with autotilesets in your game.

Only Client Side

Find:

```

DrawMapFringeTile
```
In this sub under:

```

For I = MapLayer.Fringe To MapLayer.Fringe2
```
Put this:

```

If .Layer(I).Tileset <> 0 Then
```
And now before:

```

Next
```

Put:

```

End If
```
Now let's go to the DrawMapTile Sub and do the same things (add the same If) like before.

In my game I've got 5-10 more FPS :P

[PD]

I'm suprised that this isn't in already. Good work :)

[hisherwin]

Good work xD