debug_report: Rename VkDbgMsgCallback object
diff --git a/layers/generic.h b/layers/generic.h
index 2eb3eec..7a145d7 100644
--- a/layers/generic.h
+++ b/layers/generic.h
@@ -36,7 +36,7 @@
 // The following is for logging error messages:
 struct layer_data {
     debug_report_data *report_data;
-    VkDbgMsgCallback logging_callback;
+    VkDebugReportCallbackLUNARG logging_callback;
 
     layer_data() :
         report_data(nullptr),