(svn r901) Small step in the process to clean up the DPARAM mess:

- reduce to 2 sizes (*DParam64 for 64bit values, *DParam for the rest)
- use inline functions instead of macros
- add assert()s to check for buffer overruns

network.c

@@ -1127,7 +1127,7 @@ bool NetworkCheckClientReady()
 		ready_all = ready_all && (cs->ready || cs->inactive || (cs->xmitpos>0));
 		if (!cs->ready) cs->timeout-=1;
 		if (cs->timeout == 0) {
-			SET_DPARAM16(0,count);
+			SetDParam(0,count);
 			ShowErrorMessage(-1,STR_NETWORK_ERR_TIMEOUT,0,0);
 			CloseClient(cs);
 			}