Introducde getDispatchLoaderStatic() to prevent dangling pointers in debug builds

tests/DesignatedInitializers/DesignatedInitializers.cpp

@@ -50,6 +50,9 @@ MyVulkanTest::MyVulkanTest()
 
 int main( int /*argc*/, char ** /*argv*/ )
 {
+  // to prevent a warning on unreferenced function vk::getDispatchLoaderStatic, use just one arbitrary vk-function
+  vk::enumerateInstanceVersion();
+
   char const * appName       = "DesignatedInitializers";
   uint32_t     appVersion    = 1;
   char const * engineName    = "Vulkan.hpp";