header: fix vulkan.hpp detection of 64-bit arch
The generator that produced vulkan.hpp for 1.0.25 seemed to ignore the 64-bit architecture test, thereby breaking 64-bit builds.
The macro VK_DEFINE_NON_DISPATCHABLE_HANDLE is always defined according to vulkan.h.
diff --git a/include/vulkan/vulkan.hpp b/include/vulkan/vulkan.hpp
index 473143b..61e2f8e 100644
--- a/include/vulkan/vulkan.hpp
+++ b/include/vulkan/vulkan.hpp
@@ -44,7 +44,7 @@
// 32-bit vulkan is not typesafe for handles, so don't allow copy constructors on this platform by default.
// To enable this feature on 32-bit platforms please define VULKAN_HPP_TYPESAFE_CONVERSION
-#if !defined(VK_DEFINE_NON_DISPATCHABLE_HANDLE)
+#if defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__) ) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__)
#define VULKAN_HPP_TYPESAFE_CONVERSION 1
#endif