Add note to check Vulkan SDK installation if validation layers don't work

Overv · Overv · commit 68effde0eacf · 2019-04-19T20:25:18.000+02:00
diff --git a/03_Drawing_a_triangle/00_Setup/02_Validation_layers.md b/03_Drawing_a_triangle/00_Setup/02_Validation_layers.md
@@ -344,6 +344,8 @@ window. You'll see that the following messages are printed to the command prompt
 
 ![](/images/validation_layer_test.png)
 
+>If you don't see any messages then [check your installation](https://vulkan.lunarg.com/doc/view/1.0.61.0/windows/getting_started.html#user-content-verify-the-installation).
+
 Oops, it has already spotted a bug in our program! The
 `VkDebugUtilsMessengerEXT` object needs to be cleaned up with a call to
 `vkDestroyDebugUtilsMessengerEXT`. Similarly to `vkCreateDebugUtilsMessengerEXT`
