Prevent stack-buffer-overflow with gcc -fsanitize=address
Prevent stack-buffer-overflow with gcc -fsanitize=address

The value passed to srtp_aes_gcm_openssl_set_aad is not guarantied
to be >= c->tag_len. Since the call to EVP_CIPHER_CTX_ctrl is a
dummy call pass it a dummy tag that is large enough.

persmule/libsrtp,yarrcc/libsrtp-ios,persmule/libsrtp,yarrcc/libsrtp-ios,persmule/libsrtp,yarrcc/libsrtp-ios