Allow NSS to be built with NO_NSPR_10_SUPPORT.

nss/lib/pkcs7/secmime.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/. */
 
 /*
  * Stuff specific to S/MIME policy and interoperability.
  * Depends on PKCS7, but there should be no dependency the other way around.
  */
 
 #include "secmime.h"
@@ skipping 343 matching lines @@
         cipher = smime_cipher_maps[i].cipher;
 
     cap->cipher = cipher;
     cap->capIDTag = algtag;
 }
 
 
 static long
 smime_choose_cipher (CERTCertificate *scert, CERTCertificate **rcerts)
 {
-    PRArenaPool *poolp;
+    PLArenaPool *poolp;
     long chosen_cipher;
     int *cipher_abilities;
     int *cipher_votes;
     int strong_mapi;
     int rcount, mapi, max;
 
     if (smime_policy_bits == 0) {
         PORT_SetError (SEC_ERROR_BAD_EXPORT_ALGORITHM);
         return -1;
     }
@@ skipping 438 matching lines @@
 
     /*
      * Add the email profile.  Again, if it fails for some reason,
      * may as well not give up altogether -- just assert.
      */
     rv = smime_add_profile (ecert, cinfo);
     PORT_Assert (rv == SECSuccess);
 
     return cinfo;
 }