state: make mod_index_is_consumed() return -1 on invalid input

Like all the other functions.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/src/state.c b/src/state.c
index 1511342..4c159fc 100644
--- a/src/state.c
+++ b/src/state.c
@@ -1052,8 +1052,8 @@ xkb_state_mod_index_is_consumed(struct xkb_state *state, xkb_keycode_t kc,
 {
     const struct xkb_key *key = XkbKey(state->keymap, kc);
 
-    if (!key)
-        return 0;
+    if (!key || idx >= xkb_keymap_num_mods(state->keymap))
+        return -1;
 
     return !!((1 << idx) & key_get_consumed(state, key));
 }