Index: /trunk/src/VBox/Main/src-client/ConsoleImpl2.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/ConsoleImpl2.cpp	(revision 37901)
+++ /trunk/src/VBox/Main/src-client/ConsoleImpl2.cpp	(revision 37902)
@@ -470,5 +470,6 @@
 
     hrc = aMachine->COMGETTER(PciDeviceAssignments)(ComSafeArrayAsOutParam(assignments));
-    if (hrc != S_OK)
+    if (   hrc != S_OK
+        || assignments.size() < 1)
         return hrc;