[gcab] trivial: Fix the introspection when extracting to memory

[Richard Hughes <rhughes src gnome org>]

commit 7ff3814a2f4a2bb6a6cca8e57d3368c4765844de
Author: Richard Hughes <richard hughsie com>
Date:   Tue Jan 23 10:39:11 2018 +0000

    trivial: Fix the introspection when extracting to memory

 libgcab/gcab-cabinet.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgcab/gcab-cabinet.c b/libgcab/gcab-cabinet.c
index b9866ed..edf5a98 100644
--- a/libgcab/gcab-cabinet.c
+++ b/libgcab/gcab-cabinet.c
@@ -502,7 +502,7 @@ gcab_cabinet_load (GCabCabinet *self,
 /**
  * gcab_cabinet_extract:
  * @cabinet: a #GCabCabinet
- * @path: the path to extract files, or %NULL
+ * @path: (allow-none): the path to extract files
  * @file_callback: (allow-none) (scope call) (closure user_data): an optional #GCabFile callback,
  *     return %FALSE to filter out or skip files.
  * @progress_callback: (allow-none) (scope call) (closure user_data): a progress callback