Better memory management and float rounding issues

src/users/broker.cpp

@@ -155,10 +155,10 @@ double Broker::next_submission(double date) const
 }
 
 void Broker::jobs_to_submit(
-    double date, list<Job *> &jobs, list<Profile *> &profiles)
+    double date, list<Job *> &jobs, list<const Profile *> &profiles)
 {
     jobs = list<Job *>();
-    profiles = list<Profile *>();
+    profiles = list<const Profile *>();
 
     User *user = user_queue.front();
     double planned_date_submission = user->next_submission();
@@ -172,7 +172,7 @@ void Broker::jobs_to_submit(
     {
         user_queue.pop_front();
         list<Job *> user_jobs;
-        list<Profile *> user_profiles;
+        list<const Profile *> user_profiles;
         user->jobs_to_submit(date, user_jobs, user_profiles);
 
         for (Job *job : user_jobs)