state, context: allow passing NULL to *_unref()

For error handling code, it's nice to be able to pass NULL to these
function without worrying about segfaults ensuing. free() sets the
precedent here.

Also document this fact.

Signed-off-by: Ran Benita <ran234@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/test/state.c b/test/state.c
index d23b94c..83a8f45 100644
--- a/test/state.c
+++ b/test/state.c
@@ -339,6 +339,11 @@ main(void)
 
     assert(context);
 
+    /* Make sure these are allowed. */
+    xkb_context_unref(NULL);
+    xkb_keymap_unref(NULL);
+    xkb_state_unref(NULL);
+
     keymap = test_compile_rules(context, "evdev", "pc104", "us,ru", NULL, "grp:menu_toggle");
     assert(keymap);