Fix name of Rect::getRight()

include/math.hpp

@@ -279,7 +279,7 @@ struct Rect {
 	bool isEqual(Rect r) const {
 		return pos.isEqual(r.pos) && size.isEqual(r.size);
 	}
-	float getLeft() const {
+	float getRight() const {
 		return pos.x + size.x;
 	}
 	float getBottom() const {