Code cleanup.

Assets/Cryville/Crtr/SpriteFrame.cs

@@ -61,10 +61,9 @@ namespace Cryville.Crtr {
 				return new Vector2(Texture.width, Texture.height);
 			}
 		}
-
-		public void Init() {
-			if (Texture == null)
-				throw new InvalidOperationException("Missing texture");
+		public SpriteFrame(Texture2D tex) {
+			if (tex == null) throw new ArgumentNullException("tex");
+			Texture = tex;
 			m_frame = new Rect(Vector2.zero, Size);
 			var w = m_frame.width;
 			var h = m_frame.height;
@@ -75,10 +74,5 @@ namespace Cryville.Crtr {
 			if (m_rotated) UV = new Rect(x, y, tw, -th);
 			else UV = new Rect(x, y, tw, -th);
 		}
-
-		public SpriteFrame() { }
-		public SpriteFrame(Texture2D tex) {
-			Texture = tex;
-		}
 	}
 }