solve_collision_slide no longer moves lhs arg

src/corelib/physics.c

@@ -185,7 +185,7 @@ void solve_collision_slide(object_t* left, object_t* right) {
 	float dx, dy;
 	const float d = get_solve_force(left, right, &dx, &dy);
 	left->sprite.x += dx;
-	right->sprite.y += dy;
+	left->sprite.y += dy;
 }
 
 static inline