vulkan: Fix for bug 13785.

Implement proposal in comment #3.
Agreed in June '15 Khronos face-to-face
diff --git a/include/vulkan.h b/include/vulkan.h
index dbc6f86..5846ceb 100644
--- a/include/vulkan.h
+++ b/include/vulkan.h
@@ -102,7 +102,9 @@
 #define VK_MAX_EXTENSION_NAME       256
 
 #define VK_LOD_CLAMP_NONE       MAX_FLOAT
-#define VK_LAST_MIP_OR_SLICE    0xffffffff
+#define VK_LAST_MIP_LEVEL       UINT32_MAX
+#define VK_LAST_ARRAY_SLICE     UINT32_MAX
+
 
 #define VK_WHOLE_SIZE           UINT64_MAX