directory: pass const pointers to inline functions

The inline functions directory_is_empty() and directory_get_path()
don't modify the object - pass constant object pointers to them.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/directory.h b/src/directory.h
index 4e50cf1e8..a7a632ebc 100644
--- a/src/directory.h
+++ b/src/directory.h
@@ -57,13 +57,13 @@ void
 directory_free(struct directory *directory);
 
 static inline bool
-directory_is_empty(struct directory *directory)
+directory_is_empty(const struct directory *directory)
 {
 	return directory->children.nr == 0 && directory->songs.nr == 0;
 }
 
 static inline const char *
-directory_get_path(struct directory *directory)
+directory_get_path(const struct directory *directory)
 {
 	return directory->path;
 }