refactoring: Fixed invalid return in Map

src/main/java/pacmanGame/Map.java

@@ -77,6 +77,14 @@ public class Map {
 	}
 
 	public Cell GetCell(Vector2 pos) {
-		return cells[pos.x][pos.y];
+		if(pos.isWithin(size)) {
+			
+			return cells[pos.x][pos.y];	
+		}
+		else {
+			
+			return cells[0][0];	
+		}
+		
 	}
 }