inform user about empty context
inform user about empty context

An empty context means that the original code cannot be executed.
It can be confusing to see the entire code is missing from
the generated code if the user is not aware of the empty context.

Signed-off-by: Sven Verdoolaege <235c10dd23b819f81cdc9756a251746bc184cab6@gmail.com>

Meinersbur/ppcg,Meinersbur/ppcg