gpg: Assert that an opaque parameter is really what we expect.

* g10/gpg.h (SERVER_CONTROL_MAGIC): New const.
(server_control_s): Add field 'magic'.
* g10/gpg.c (gpg_init_default_ctrl): Init MAGIC.
* g10/import.c (impex_filter_getval): Assert MAGIC.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/g10/gpg.c b/g10/gpg.c
index 28e0a9c64..c9ae28c61 100644
--- a/g10/gpg.c
+++ b/g10/gpg.c
@@ -2182,7 +2182,7 @@ set_compliance_option (enum cmd_and_opt_values option)
 static void
 gpg_init_default_ctrl (ctrl_t ctrl)
 {
-  (void)ctrl;
+  ctrl->magic = SERVER_CONTROL_MAGIC;
 }