Missing return. BeOS style add-ons seem to work again (tested with ramfs).

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29368 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/file_systems/userlandfs/server/beos/BeOSKernelVolume.cpp

@@ -156,6 +156,8 @@ BeOSKernelVolume::GetVNodeType(void* node, int* type)
 			// the "remove_vnode()" callback), publish_vnode(),
 			// (x-1)*get_vnode().
 	}
+
+	return B_OK;
 }