From 8534fda28c28d016ad8894290bd90915dbd9e70b Mon Sep 17 00:00:00 2001
From: Pascal Thomet <pthomet@gmail.com>
Date: Wed, 10 Apr 2024 14:58:05 +0200
Subject: [PATCH] fix abstractRunner / use HELLOIMGUI_USE_NULL

---
 src/hello_imgui/internal/backend_impls/abstract_runner.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/hello_imgui/internal/backend_impls/abstract_runner.cpp b/src/hello_imgui/internal/backend_impls/abstract_runner.cpp
index db0a492e..376b4418 100644
--- a/src/hello_imgui/internal/backend_impls/abstract_runner.cpp
+++ b/src/hello_imgui/internal/backend_impls/abstract_runner.cpp
@@ -742,7 +742,11 @@ void AbstractRunner::InitRenderBackendCallbacks()
     }
     else if (params.rendererBackendType == RendererBackendType::Null)
     {
-        mRenderingBackendCallbacks = CreateBackendCallbacks_Null();
+        #ifdef HELLOIMGUI_USE_NULL
+            mRenderingBackendCallbacks = CreateBackendCallbacks_Null();
+        #else
+            IM_ASSERT(false && "Null backend is not available!");
+        #endif
     }
     else
     {