Fix return type of internal function
Fixes incomplete change in
@@ -74,7 +74,7 @@ static int chachapoly_pad_aad( mbedtls_chachapoly_context *ctx )
*
* \param ctx The ChaCha20-Poly1305 context.
*/
-static void chachapoly_pad_ciphertext( mbedtls_chachapoly_context *ctx )
+static int chachapoly_pad_ciphertext( mbedtls_chachapoly_context *ctx )
{
uint32_t partial_block_len = (uint32_t) ( ctx->ciphertext_len % 16U );
unsigned char zeroes[15];
