btdev: Fix build error

This fixes the following build error:

emulator/btdev.c: In function ‘le_cis_estabilished’:
emulator/btdev.c:5947:22: error: ‘cis_idx’ may be used
uninitialized [-Werror=maybe-uninitialized]
 5947 |         int cig_idx, cis_idx;
      |                      ^~~~~~~

diff --git a/emulator/btdev.c b/emulator/btdev.c
index 2e57337..462f352 100755 (executable)
--- a/emulator/btdev.c
+++ b/emulator/btdev.c
@@ -5944,7 +5944,7 @@ static void le_cis_estabilished(struct btdev *dev, struct btdev_conn *conn,
                                                uint8_t status)
 {
        struct bt_hci_evt_le_cis_established evt;
-       int cig_idx, cis_idx;
+       int cig_idx, cis_idx = -1;
 
        memset(&evt, 0, sizeof(evt));