tree-wide: use -EINVAL for enum invalid values

As suggested in https://github.com/systemd/systemd/pull/11484#issuecomment-775288617.

This does not touch anything exposed in src/systemd. Changing the defines there
would be a compatibility break.

Note that tests are broken after this commit. They will be fixed in the next one.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/basic/architecture.h b/src/basic/architecture.h
index 1db625cf80..9abc1831da 100644
--- a/src/basic/architecture.h
+++ b/src/basic/architecture.h
@@ -45,7 +45,7 @@ enum {
         ARCHITECTURE_ARC,
         ARCHITECTURE_ARC_BE,
         _ARCHITECTURE_MAX,
-        _ARCHITECTURE_INVALID = -1
+        _ARCHITECTURE_INVALID = -EINVAL,
 };
 
 int uname_architecture(void);