isl_basic_set_variable_compression_with_id: plug memory leak on error path
isl_basic_set_variable_compression_with_id: plug memory leak on error path

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

Meinersbur/isl,Meinersbur/isl,Meinersbur/isl,Meinersbur/isl