lib-fs: fs_unlock(NULL) should be a no-op

diff --git a/src/lib-fs/fs-api.c b/src/lib-fs/fs-api.c
index 3e749076c9e1a9ca5b06d4c7d033dc1aea9b3973..93c9f764eff68d9fd3289fc09ba79f2aa88f3d2f 100644 (file)
--- a/src/lib-fs/fs-api.c
+++ b/src/lib-fs/fs-api.c
@@ -897,6 +897,9 @@ void fs_unlock(struct fs_lock **_lock)
 {
        struct fs_lock *lock = *_lock;
 
+       if (lock == NULL)
+               return;
+
        *_lock = NULL;
        T_BEGIN {
                lock->file->fs->v.unlock(lock);