[7607] Improvements in support some generic achievement classes Author: VladimirMangos

* Implement support achievements with refAchievement field != 0, that have criterias stored in achievement refAchievement.
    * Implement support achievement complete req. with specific count of completed critirias.
    * Avoid full achievement list scan at search achievement associated with criteria.

--HG--
branch : trunk

src/game/InstanceSaveMgr.cpp

@@ -308,7 +308,7 @@ void InstanceSaveManager::CleanupInstances()
     }
 
     bar.step();
-    sLog.outString("");
+    sLog.outString();
     sLog.outString( ">> Initialized %u instances", (uint32)InstanceSet.size());
 }
 
@@ -358,7 +358,7 @@ void InstanceSaveManager::PackInstances()
     }
 
     sLog.outString( ">> Instance numbers remapped, next instance id is %u", InstanceNumber );
-    sLog.outString("");
+    sLog.outString();
 }
 
 void InstanceSaveManager::LoadResetTimes()