[ns] bug in the NIST addon (+fix)

[naouar yaagoubi]

hi all,
I have discovered a bug in the nist addon in the channel.cc file:

this piece of code compute the affected nodes in the range of the sending
node so that the channel object will send the packet  to their NetIf

for(tmp = xListHead_; tmp != NULL; tmp = tmp->nextX_) {
        if(tmp->Y() >= ymin && tmp->Y() <= ymax && tmp->X() >= xmin &&
tmp->Y() <= ymax)
            tmpList[n++] = tmp;
    }

As you can see the tmp->Y() <= ymax is repeated  twice in the If statement.
To correct this issue just change one of the tmp->Y() <= ymax to tmp->X() <=
xmax

best regards