package_deb.bbclass: Avoid writing empty custom fields

Avoids parser errors if PACKAGE_ADD_METADATA_DEB is set to an
empty value.

(From OE-Core rev: f0959c0908dfb386d29f13fcd3e57b2b004c6c14)

Signed-off-by: Andreas Oberritter <obi@opendreambox.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/classes/package_deb.bbclass b/meta/classes/package_deb.bbclass
index 3cd5efa788..eacabcdb61 100644
--- a/meta/classes/package_deb.bbclass
+++ b/meta/classes/package_deb.bbclass
@@ -187,7 +187,7 @@ python do_package_deb () {
         # more fields
 
         custom_fields_chunk = get_package_additional_metadata("deb", localdata)
-        if custom_fields_chunk is not None:
+        if custom_fields_chunk:
             ctrlfile.write(custom_fields_chunk)
             ctrlfile.write("\n")