[ns] statement has no effect with CURRENT_TIME

[elise hu]

Hi,

like pretty much everyone on this mailing list, i'm implementing an ad-hoc 
routing agent.
My code compiles and is built into ns - however i have a warning :
    warning: statement has no effect
for pretty much every line looking like :
   expire_time = CURRENT_TIME + nb_freshness_*t_br_;
(i have a few) - so that's a bit worrying.  CURRENT_TIME is defined as :
   #define CURRENT_TIME Scheduler::instance().clock();
this doesn't seem to be related to any weird loop, so i wonder what is wrong 
?
thanks

Elise

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