Allow NSS to be built with NO_NSPR_10_SUPPORT.

nss/lib/freebl/ec.c

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #ifdef FREEBL_NO_DEPEND
 #include "stubs.h"
 #endif
 
 
 #include "blapi.h"
@@ skipping 186 matching lines @@
 /* Generates a new EC key pair. The private key is a supplied
  * value and the public key is the result of performing a scalar 
  * point multiplication of that value with the curve's base point.
  */
 SECStatus 
 ec_NewKey(ECParams *ecParams, ECPrivateKey **privKey, 
     const unsigned char *privKeyBytes, int privKeyLen)
 {
     SECStatus rv = SECFailure;
 #ifdef NSS_ENABLE_ECC
-    PRArenaPool *arena;
+    PLArenaPool *arena;
     ECPrivateKey *key;
     mp_int k;
     mp_err err = MP_OKAY;
     int len;
 
 #if EC_DEBUG
     printf("ec_NewKey called\n");
 #endif
     MP_DIGITS(&k) = 0;
 
@@ skipping 853 matching lines @@
     printf("ECDSA verification %s\n",
         (rv == SECSuccess) ? "succeeded" : "failed");
 #endif
 #else
     PORT_SetError(SEC_ERROR_UNSUPPORTED_KEYALG);
 #endif /* NSS_ENABLE_ECC */
 
     return rv;
 }