ikev2: Fix size of key material for CAMELLIA-CTR

Like AES in CTR mode it includes a 4 byte nonce.

src/libcharon/sa/ikev2/keymat_v2.c

@@ -527,6 +527,7 @@ METHOD(keymat_v2_t, derive_child_keys, bool,
 			case ENCR_AES_GCM_ICV12:
 			case ENCR_AES_GCM_ICV16:
 			case ENCR_AES_CTR:
+			case ENCR_CAMELLIA_CTR:
 			case ENCR_NULL_AUTH_AES_GMAC:
 			case ENCR_CHACHA20_POLY1305:
 				enc_size += 4;