message: Don't overwrite vkGetInstanceProcAddress
  The vk::DispatchLoaderDynamic::init(vk::VkInstance) method should note
  use vkGetInstanceProcAddr to overwrite vkGetInstanceProcAddr itself.
  vkGetInstanceProcAddr( a_valid_instance, "vkGetInstanceProcAddr" ) is
  required to return NULL.
  Fixes: 1108
diff: @@ -6066,6 +6066,11 @@ std::string VulkanHppGenerator::generateDispatchLoaderDynamicCommandAssignment(
  CommandData const & commandData,
  std::string const & firstArg ) const
  {
  + if (commandName == "vkGetInstanceProcAddr")
  + {
  + // Don't overwite vkGetInstanceProcAddr with NULL.
  + return "";
  + }
  std::string str = " " + commandName + " = PFN_" + commandName + "( vkGet" +
  ( ( firstArg == "device" ) ? "Device" : "Instance" ) + "ProcAddr( " + firstArg + ", \"" +
  commandName + "\" ) );\n";
  