rpcrt4: Constify some variables

[Andrew Talbot]

Changelog:
    rpcrt4: Constify some variables.

diff -urN a/dlls/rpcrt4/rpc_server.c b/dlls/rpcrt4/rpc_server.c
--- a/dlls/rpcrt4/rpc_server.c	2007-07-23 17:45:24.000000000 +0100
+++ b/dlls/rpcrt4/rpc_server.c	2007-08-21 20:53:57.000000000 +0100
@@ -119,7 +119,7 @@
 }
 
 static RpcServerInterface* RPCRT4_find_interface(UUID* object,
-                                                 RPC_SYNTAX_IDENTIFIER* if_id,
+                                                 const RPC_SYNTAX_IDENTIFIER* if_id,
                                                  BOOL check_object)
 {
   UUID* MgrType = NULL;
diff -urN a/dlls/rpcrt4/rpc_transport.c b/dlls/rpcrt4/rpc_transport.c
--- a/dlls/rpcrt4/rpc_transport.c	2007-07-23 17:45:24.000000000 +0100
+++ b/dlls/rpcrt4/rpc_transport.c	2007-08-21 21:14:51.000000000 +0100
@@ -1475,7 +1475,7 @@
 
 #define ROUND_UP(value, alignment) (((value) + ((alignment) - 1)) & ~((alignment)-1))
 
-static RPC_STATUS RpcAssoc_BindConnection(RpcAssoc *assoc, RpcConnection *conn,
+static RPC_STATUS RpcAssoc_BindConnection(const RpcAssoc *assoc, RpcConnection *conn,
                                           const RPC_SYNTAX_IDENTIFIER *InterfaceId,
                                           const RPC_SYNTAX_IDENTIFIER *TransferSyntax)
 {