fix building with aftermath

ref_vk/vk_core.c

@@ -425,13 +425,15 @@ static qboolean pickAndCreateDevice( qboolean skip_first_device )
 		VkDeviceDiagnosticsConfigCreateInfoNV diag_config_nv = {
 			.sType = VK_STRUCTURE_TYPE_DEVICE_DIAGNOSTICS_CONFIG_CREATE_INFO_NV,
 			.flags = VK_DEVICE_DIAGNOSTICS_CONFIG_ENABLE_AUTOMATIC_CHECKPOINTS_BIT_NV | VK_DEVICE_DIAGNOSTICS_CONFIG_ENABLE_RESOURCE_TRACKING_BIT_NV | VK_DEVICE_DIAGNOSTICS_CONFIG_ENABLE_SHADER_DEBUG_INFO_BIT_NV,
-			.pNext = head,
+			.pNext = &features,
 		};
-		head = &diag_config_nv;
+		void *head = &diag_config_nv;
+#else
+	void *head = &features;
 #endif
 		VkDeviceCreateInfo create_info = {
 			.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
-			.pNext = &features,
+			.pNext = head,
 			.flags = 0,
 			.queueCreateInfoCount = 1,
 			.pQueueCreateInfos = &queue_info,