1 files changed, 4 insertions, 0 deletions
diff --git a/ball.h b/ball.h
index 4618b46..db3ee12 100644
--- a/ball.h
+++ b/ball.h
@@ -22,5 +22,9 @@ int  GLPong_BallCollide(const Ball_t * a, const Ball_t * b);
 void GLPong_BallMoveAll(Ball_t ** balls);
 void GLPong_BallDrawAll(Ball_t * balls);
 
+#ifdef DEBUG
+int length(Ball_t * balls);
+#endif
+
 #endif