dlls/dinput: return an error in IDirectInputDevice2AImpl_GetProperty()

[Austin English]

For http://bugs.winehq.org/show_bug.cgi?id=19562

-- 
-Austin
-------------- next part --------------
diff --git a/dlls/dinput/device.c b/dlls/dinput/device.c
index a5c61ab..eede95c 100644
--- a/dlls/dinput/device.c
+++ b/dlls/dinput/device.c
@@ -887,7 +887,8 @@ HRESULT WINAPI IDirectInputDevice2AImpl_GetProperty(
             break;
         }
         default:
-            WARN("Unknown property %s\n", debugstr_guid(rguid));
+            FIXME("Unknown property %s\n", debugstr_guid(rguid));
+            return DIERR_INVALIDPARAM;
             break;
     }