Core: Do not use STL container size method to check if container is empty

src/server/scripts/EasternKingdoms/Karazhan/boss_midnight.cpp

@@ -286,7 +286,7 @@ void boss_attumen::boss_attumenAI::UpdateAI(const uint32 diff)
                     target_list.push_back(pTarget);
                 pTarget = NULL;
             }
-            if (target_list.size())
+            if (!target_list.empty())
                 pTarget = *(target_list.begin()+rand()%target_list.size());
 
             DoCast(pTarget, SPELL_BERSERKER_CHARGE);

src/server/scripts/EasternKingdoms/Karazhan/boss_prince_malchezaar.cpp

@@ -312,7 +312,7 @@ public:
             std::list<HostileReference *> t_list = me->getThreatManager().getThreatList();
             std::vector<Unit* > targets;
 
-            if (!t_list.size())
+            if (t_list.empty())
                 return;
 
             //begin + 1, so we don't target the one with the highest threat

src/server/scripts/EasternKingdoms/ScarletMonastery/boss_headless_horseman.cpp

@@ -525,7 +525,7 @@ public:
                     me->IsWithinDistInMap(i->getSource(), range) && i->getSource()->isAlive())
                     temp.push_back(i->getSource());
 
-            if (temp.size())
+            if (!temp.empty())
             {
                 j = temp.begin();
                 advance(j, rand()%temp.size());

src/server/scripts/EasternKingdoms/ZulAman/boss_janalai.cpp

@@ -247,7 +247,7 @@ class boss_janalai : public CreatureScript
                 }
 
                 //sLog->outError("Eggs %d at middle", templist.size());
-                if (!templist.size())
+                if (templist.empty())
                     return false;
 
                 for (std::list<Creature*>::const_iterator i = templist.begin(); i != templist.end(); ++i)

src/server/scripts/EasternKingdoms/ZulAman/boss_nalorakk.cpp

@@ -175,7 +175,7 @@ class boss_nalorakk : public CreatureScript
                     cell.Visit(pair, cSearcher, *(me->GetMap()));
                 }
 
-                if (!templist.size())
+                if (templist.empty())
                     return;
 
                 for (std::list<Creature*>::const_iterator i = templist.begin(); i != templist.end(); ++i)

src/server/scripts/Outland/BlackTemple/boss_bloodboil.cpp

@@ -144,7 +144,7 @@ public:
             // Get the Threat List
             std::list<HostileReference *> m_threatlist = me->getThreatManager().getThreatList();
 
-            if (!m_threatlist.size()) // He doesn't have anyone in his threatlist, useless to continue
+            if (m_threatlist.empty()) // He doesn't have anyone in his threatlist, useless to continue
                 return;
 
             std::list<Unit* > targets;

src/server/scripts/Outland/GruulsLair/boss_high_king_maulgar.cpp

@@ -776,7 +776,7 @@ public:
                         target_list.push_back(pTarget);
                     pTarget = NULL;
                 }
-                if (target_list.size())
+                if (!target_list.empty())
                     pTarget = *(target_list.begin()+rand()%target_list.size());
 
                 me->InterruptNonMeleeSpells(false);