Clean up warnings from release build
diff --git a/tests/vkrenderframework.cpp b/tests/vkrenderframework.cpp
index b5e528c..9d6d991 100644
--- a/tests/vkrenderframework.cpp
+++ b/tests/vkrenderframework.cpp
@@ -1041,7 +1041,7 @@
VkShaderObj::VkShaderObj(VkDeviceObj *device, const char * shader_code, VkShaderStage stage, VkRenderFramework *framework)
{
- VkResult err = VK_SUCCESS;
+ VkResult U_ASSERT_ONLY err = VK_SUCCESS;
std::vector<unsigned int> spv;
VkShaderCreateInfo createInfo;
VkShaderModuleCreateInfo moduleCreateInfo;