progs/demos: Fix memory leak in fslight.c.
diff --git a/progs/demos/fslight.c b/progs/demos/fslight.c
index f0d76a4..acba3e9 100644
--- a/progs/demos/fslight.c
+++ b/progs/demos/fslight.c
@@ -353,6 +353,7 @@
    glNewList(SphereList, GL_COMPILE);
    gluSphere(obj, 2.0f, 10, 5);
    glEndList();
+   gluDeleteQuadric(obj);
 }
 
 static void