Set default transparency

Co-authored-by: r3cp3ct <45179536+r3cp3ct@users.noreply.github.com>
Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

src/sig/engine/objects/Object.java

@@ -18,7 +18,7 @@ import sig.engine.Transform;
 
 public abstract class Object implements GameEntity{
     double x,y;
-    Alpha transparency;
+    Alpha transparency = Alpha.ALPHA0;
     Sprite spr;
     Panel panel;
     protected Rectangle collisionBox;

src/sig/objects/LevelRenderer.java

@@ -7,7 +7,6 @@ import sig.engine.Action;
 import sig.engine.Alpha;
 import sig.engine.Font;
 import sig.engine.Key;
-import sig.engine.MouseScrollValue;
 import sig.engine.PaletteColor;
 import sig.engine.Panel;
 import sig.engine.Sprite;