Bugzilla bug #15858: fixed compiler warnings.

nsprpub/pr/src/io/prsocket.c

@@ -462,7 +462,6 @@ PRIntervalTime timeout)
 static PRStatus PR_CALLBACK SocketBind(PRFileDesc *fd, const PRNetAddr *addr)
 {
 	PRInt32 result;
-	int one = 1;
 
 	PR_ASSERT(IsValidNetAddr(addr) == PR_TRUE);
 

nsprpub/pr/src/misc/prnetdb.c

@@ -988,10 +988,11 @@ PR_IMPLEMENT(PRStatus) PR_DestroyNetAddr(PRNetAddr *addr)
 
 PR_IMPLEMENT(PRStatus) PR_StringToNetAddr(const char *string, PRNetAddr *addr)
 {
-    PRIntn rv;
     PRStatus status = PR_SUCCESS;
 
 #if defined(_PR_INET6)
+    PRIntn rv;
+
     rv = inet_pton(AF_INET6, string, &addr->ipv6.ip);
     if (1 == rv)
     {

nsprpub/pr/src/pthreads/ptio.c

@@ -1301,7 +1301,7 @@ void _PR_InitIO()
     PRIntn index;
     char *num_io_queues;
 
-    if (num_io_queues = getenv("NSPR_NUM_IO_QUEUES"))
+    if (NULL != (num_io_queues = getenv("NSPR_NUM_IO_QUEUES")))
     {
         _pt_tq_count = atoi(num_io_queues);
     }
@@ -1829,7 +1829,6 @@ failed:
 static PRStatus pt_Bind(PRFileDesc *fd, const PRNetAddr *addr)
 {
     PRIntn rv;
-    PRInt32 one = 1;
     pt_SockLen addr_len;
 #ifdef _PR_HAVE_SOCKADDR_LEN
     PRNetAddr addrCopy;