[gtk/matthiasc/for-master] Fix build with recent Vulkan versions

[Matthias Clasen <matthiasc src gnome org>]

commit 09b3fc937137aadb5f487d1594a0c93bb52f4451
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Dec 17 19:19:23 2020 -0500

    Fix build with recent Vulkan versions
    
    The way this enumeration is updated is ... special.

 gdk/gdkvulkancontext.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gdk/gdkvulkancontext.c b/gdk/gdkvulkancontext.c
index 917b443f94..c80e56f697 100644
--- a/gdk/gdkvulkancontext.c
+++ b/gdk/gdkvulkancontext.c
@@ -210,8 +210,10 @@ gdk_vulkan_strerror (VkResult result)
       return "An unknown error has occurred; either the application has provided invalid input, or an 
implementation failure has occurred.";
 #endif
 #if VK_HEADER_VERSION >= 135
+#if VK_HEADER_VERSION < 162
     case VK_ERROR_INCOMPATIBLE_VERSION_KHR:
       return "Acceleration structure serialized with version as the version information is not compatible 
with device.";
+#endif
     case VK_THREAD_IDLE_KHR:
       return "A deferred operation is not complete but there is currently no work for this thread to do at 
the time of this call.";
     case VK_THREAD_DONE_KHR: