server: Clear last error when creating object without name.

server/directory.c

@@ -287,7 +287,11 @@ void *create_named_object_dir( struct directory *root, const struct unicode_str
     struct object *obj, *new_obj = NULL;
     struct unicode_str new_name;
 
-    if (!name || !name->len) return alloc_object( ops );
+    if (!name || !name->len)
+    {
+        if ((new_obj = alloc_object( ops ))) clear_error();
+        return new_obj;
+    }
 
     if (!(obj = find_object_dir( root, name, attributes, &new_name ))) return NULL;
     if (!new_name.len)

server/named_pipe.c

@@ -671,7 +671,11 @@ static struct named_pipe *create_named_pipe( struct directory *root, const struc
     struct named_pipe *pipe = NULL;
     struct unicode_str new_name;
 
-    if (!name || !name->len) return alloc_object( &named_pipe_ops );
+    if (!name || !name->len)
+    {
+        if ((pipe = alloc_object( &named_pipe_ops ))) clear_error();
+        return pipe;
+    }
 
     if (!(obj = find_object_dir( root, name, attr, &new_name )))
     {

server/object.c

@@ -242,7 +242,11 @@ void *create_named_object( struct namespace *namespace, const struct object_ops
 {
     struct object *obj;
 
-    if (!name || !name->len) return alloc_object( ops );
+    if (!name || !name->len)
+    {
+        if ((obj = alloc_object( ops ))) clear_error();
+        return obj;
+    }
 
     if ((obj = find_object( namespace, name, attributes )))
     {