Allow NSS to be built with NO_NSPR_10_SUPPORT.

nss/lib/softoken/lowpbe.c

Index: nss/lib/softoken/lowpbe.c
===================================================================
--- nss/lib/softoken/lowpbe.c	(revision 203524)
+++ nss/lib/softoken/lowpbe.c	(working copy)
@@ -426,7 +426,7 @@
 		   NSSPKCS5PBEParameter *pbe_param, SECItem *pwitem, 
 		   PBEBitGenID bitGenPurpose, unsigned int bytesNeeded)
 {
-    PRArenaPool *arena = NULL;
+    PLArenaPool *arena = NULL;
     unsigned int SLen,PLen;
     unsigned int hashLength = hashObject->length;
     unsigned char *S, *P;
@@ -741,7 +741,7 @@
 NSSPKCS5PBEParameter *
 nsspkcs5_NewParam(SECOidTag alg, SECItem *salt, int iterator)
 {
-    PRArenaPool *arena = NULL;
+    PLArenaPool *arena = NULL;
     NSSPKCS5PBEParameter *pbe_param = NULL;
     SECStatus rv = SECFailure;
 
@@ -1277,7 +1277,7 @@
  * SECOID_DestroyAlgorithmID
  */
 SECAlgorithmID *
-nsspkcs5_CreateAlgorithmID(PRArenaPool *arena, SECOidTag algorithm, 
+nsspkcs5_CreateAlgorithmID(PLArenaPool *arena, SECOidTag algorithm,
 					NSSPKCS5PBEParameter *pbe_param)
 {
     SECAlgorithmID *algid, *ret_algid = NULL;