Cleanup libsquashfs invalid argument error codes

 - Add an explicit "you're holding it wrong" error code.
 - Consistently return error codes and not have some special places
   where -1 is returned.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sqfs/comp/compressor.c b/lib/sqfs/comp/compressor.c
index c835f3f..0b8b5e9 100644
--- a/lib/sqfs/comp/compressor.c
+++ b/lib/sqfs/comp/compressor.c
@@ -141,7 +141,7 @@ int sqfs_compressor_id_from_name(const char *name, E_SQFS_COMPRESSOR *out)
 		}
 	}
 
-	return -1;
+	return SQFS_ERROR_UNSUPPORTED;
 }
 
 int sqfs_compressor_config_init(sqfs_compressor_config_t *cfg,