lib: Make file_lock_free(NULL) no-op

diff --git a/src/lib/file-lock.c b/src/lib/file-lock.c
index e86153ef335331bdc7c957f0cf67dc769352deec..7e584b95ff5ac7f70630cd2d488487201dbb7f76 100644 (file)
--- a/src/lib/file-lock.c
+++ b/src/lib/file-lock.c
@@ -414,6 +414,9 @@ void file_lock_free(struct file_lock **_lock)
 {
        struct file_lock *lock = *_lock;
 
+       if (lock == NULL)
+               return;
+
        *_lock = NULL;
 
        if (lock->unlink_on_free)