Fix to melee dead-zone (#275)

Author: bozimmerman

src/modules/Bots/playerbot/strategy/actions/AttackAction.cpp

@@ -57,8 +57,8 @@ bool AttackAction::Attack(Unit* target)
         if (verbose)
         {
             ai->TellMaster("I have no target");
-            return false;
         }
+        return false;
     }
 
     ostringstream msg;

src/modules/Bots/playerbot/strategy/actions/ReachTargetActions.h

@@ -47,6 +47,11 @@ namespace ai
     {
     public:
         ReachMeleeAction(PlayerbotAI* ai) : ReachTargetAction(ai, "reach melee", sPlayerbotAIConfig.meleeDistance) {}
+
+        virtual bool isUseful()
+        {
+            return AI_VALUE2(float, "distance", "current target") > distance + sPlayerbotAIConfig.contactDistance + bot->GetObjectBoundingRadius();
+        }
     };
 
     class ReachSpellAction : public ReachTargetAction