Bug 1083624 - Fix assertion failure in Factory::GetDirect3D10Device(). r=bas.

--HG--
extra : rebase_source : e28b1575b8bd4706d7d203696a1280c76e103ef6

gfx/2d/Factory.cpp

@@ -548,11 +548,12 @@ Factory::SetDirect3D10Device(ID3D10Device1 *aDevice)
 
 ID3D10Device1*
 Factory::GetDirect3D10Device()
-
 {
 #ifdef DEBUG
-  UINT mode = mD3D10Device->GetExceptionMode();
-  MOZ_ASSERT(0 == mode);
+  if (mD3D10Device) {
+    UINT mode = mD3D10Device->GetExceptionMode();
+    MOZ_ASSERT(0 == mode);
+  }
 #endif
   return mD3D10Device;
 }