bug564026 - [OS/2] fix linking issues with layers on shared builds r=ted

--HG--
extra : rebase_source : 10cb036b2e2e41de85d1b318d982f027d21e4554

gfx/thebes/src/gfxDllDeps.cpp

@@ -2,3 +2,12 @@
 #include "LayerManagerOGL.h"
 #include "BasicLayers.h"
 #include "ImageLayers.h"
+
+using namespace mozilla;
+using namespace layers;
+
+void XXXNeverCalled_Layers()
+{
+  BasicLayerManager(nsnull);
+  LayerManagerOGL(nsnull);
+}