files: make sure sourceset is always set

Signed-off-by: Tobias Ulmer <tu@emlix.com>

diff --git a/plugins/files.lua b/plugins/files.lua
index 6edcf10c95612165e97d0ab8c07ab53926baa40e..b41e1022f7acd6e8c27cf58b4d092fd3f079f72a 100644 (file)
--- a/plugins/files.lua
+++ b/plugins/files.lua
@@ -350,7 +350,9 @@ function files.files_source:file_iter()
     end
 end
 
-function files.files_source:sourceid(sourceset --[[always ignored for files]])
+function files.files_source:sourceid(sourceset)
+    assertIsStringN(sourceset)
+
     local hc, licences
 
     if self._sourceid then