Added logging of window size.

tests/iconify.c

@@ -62,6 +62,8 @@ static void key_callback(GLFWwindow window, int key, int action)
 
 static void size_callback(GLFWwindow window, int width, int height)
 {
+    printf("%0.2f Size %ix%i\n", glfwGetTime(), width, height);
+
     glViewport(0, 0, width, height);
 }