Corpse Class Private scope variables renamed for understandability across the source

Removed ThrowDBError from the source
Implemented MySQL query error log at the root of the MySQL API
Readability changes

zone/spawn2.cpp

@@ -736,8 +736,6 @@ bool SpawnConditionManager::LoadSpawnConditions(const char* zone_name, uint32 in
 	//clear out old stuff..
 	spawn_conditions.clear();
 
-
-
 	std::string query = StringFormat("SELECT id, onchange, value "
                                     "FROM spawn_conditions "
                                     "WHERE zone = '%s'", zone_name);