Silent warnings on unused variables in some tests; make test UniqueHandleDefaultArguments part of the solution for 64 bit only. (#1704)

tests/UniqueHandleDefaultArguments/UniqueHandleDefaultArguments.cpp

@@ -14,6 +14,8 @@
 //
 // VulkanHpp Test: Compile only test for issue 467.
 
+// Should be used on 64 bit only, as on 32 bit the test is ambiguous.
+
 #define VULKAN_HPP_NO_EXCEPTIONS
 #define VULKAN_HPP_DISPATCH_LOADER_DYNAMIC 1
 
@@ -21,12 +23,9 @@
 
 VULKAN_HPP_DEFAULT_DISPATCH_LOADER_DYNAMIC_STORAGE
 
-#if defined( __x86_64__ ) || defined( _M_X64 )
-// On 32-bit systems the test is ambiguous.
 int main( int /*argc*/, char ** /*argv*/ )
 {
   VkSurfaceKHR surface       = 0;
   auto         uniqueSurface = vk::UniqueSurfaceKHR( surface, vk::Instance() );
   return 0;
 }
-#endif