Fixed NaN black screen

core/src/mindustry/editor/MapView.java

@@ -233,6 +233,9 @@ public class MapView extends Element implements GestureListener{
 
     @Override
     public void draw(){
+        //can cause NaN
+        if(editor.width() == 0 || editor.height() == 0) return;
+
         float ratio = 1f / ((float)editor.width() / editor.height());
         float size = Math.min(width, height);
         float sclwidth = size * zoom;

core/src/mindustry/mod/DataImagePacker.java

@@ -144,7 +144,6 @@ public class DataImagePacker{
 
         packer.forceDispose();
 
-
         //getRegions is intentionally not modified, it's a hassle to manage, O(n) to unapply, and not used anywhere important. there's no point.
         //the drawable map isn't used, and thus not modified either