No need to pay subsidy for ecological fund account

contracts/hddpool/hddpool.cpp

@@ -357,6 +357,9 @@ void hddpool::sellhdd(name user, int64_t amount, std::string memo)
        token_account, N(transfer),
        std::make_tuple(hdd_exchg_acc, user, quant, memo))
        .send();
+   
+   if(user.value == ecologyfound_acc.value) 
+      return;
 
    if(_gparmas_state.dup_remove_ratio < 40000) {
       int64_t _yta_amount2 =(int64_t)( ( (double)amount/10000) * ((double)_gparmas_state.hdd_price/(double)_gparmas_state.yta_price) * ((double)(40000-_gparmas_state.dup_remove_ratio)/10000) * ((double)_gparmas_state.dup_remove_dist_ratio/10000) );