Index: /trunk/src/VBox/Main/VMMDevInterface.cpp
===================================================================
--- /trunk/src/VBox/Main/VMMDevInterface.cpp	(revision 29403)
+++ /trunk/src/VBox/Main/VMMDevInterface.cpp	(revision 29404)
@@ -116,5 +116,5 @@
 PPDMIVMMDEVPORT VMMDev::getVMMDevPort()
 {
-    Assert(mpDrv);
+    AssertReturn(mpDrv, NULL);
     return mpDrv->pUpPort;
 }