classes/spdx-common: Return empty list from extract_licenses

This is nicer as the normal return type is a list, so the calling code
doesn't have to deal with a None sometimes and a list others.

(From OE-Core rev: e200aa9cc6ceb8ca58ef239a1a5565287b38ce55)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/classes/spdx-common.bbclass b/meta/classes/spdx-common.bbclass
index f6fc182838..03f1d0cc27 100644
--- a/meta/classes/spdx-common.bbclass
+++ b/meta/classes/spdx-common.bbclass
@@ -58,7 +58,7 @@ def extract_licenses(filename):
                 return ascii_licenses
     except Exception as e:
         bb.warn(f"Exception reading {filename}: {e}")
-    return None
+    return []
 
 def is_work_shared_spdx(d):
     return bb.data.inherits_class('kernel', d) or ('work-shared' in d.getVar('WORKDIR'))