// IDs in XAO correspond to indices of allProjectors
std::set<int>::iterator id = groups[i]->begin(), end = groups[i]->end();
for ( ; id != end; ++id, ++nbFound )
- if ( *id < allProjectors.size() )
+ if ( *id < (int) allProjectors.size() )
groupProjectors.push_back ( & allProjectors[ *id ]);
}