optimize otb/xml a bit.

m_itemTypes was being resized too much than expected so is allocin
new itemtype each time it was not being found (which is fake).

otb loader is slow, not sure if it's because of the binary reader
or just the file format is stupid

src/otclient/thingtypemanager.cpp

@@ -109,15 +109,15 @@ void ThingTypeManager::loadOtb(const std::string& file)
     if(signature != 0)
         stdext::throw_exception("invalid otb file");
 
-    root->getU32(); // flags
+    root->skip(4);
 
     m_otbMajorVersion = root->getU32();
     m_otbMinorVersion = root->getU32();
-    root->getU32(); // build number
+    root->skip(4);
     root->skip(128); // description
 
     m_reverseItemTypes.clear();
-    m_itemTypes.resize(root->getChildren().size(), m_nullItemType);
+    m_itemTypes.resize(root->getChildren().size() + 1, m_nullItemType);
 
     for(const BinaryTreePtr& node : root->getChildren()) {
         ItemTypePtr itemType(new ItemType);
@@ -185,7 +185,7 @@ void ThingTypeManager::parseItemType(uint16 id, TiXmlElement* elem)
 {
     uint16 serverId = id;
     ItemTypePtr itemType = nullptr;
-    if(serverId > 20000 && id < 20100) {
+    if(serverId > 20000 && serverId < 20100) {
         serverId -= 20000;
 
         itemType = ItemTypePtr(new ItemType);
@@ -193,15 +193,8 @@ void ThingTypeManager::parseItemType(uint16 id, TiXmlElement* elem)
         addItemType(itemType);
     }
 
-    if(!itemType) {
-        itemType = getItemType(serverId);
-        if(itemType == m_nullItemType) {
-            itemType = ItemTypePtr(new ItemType);
-            itemType->setServerId(id);
-            addItemType(itemType);
-        }
-    }
-
+    itemType = getItemType(serverId);
+    assert(itemType && "Internal error");
     itemType->setName(elem->Attribute("name"));
     for(TiXmlElement* attrib = elem->FirstChildElement(); attrib; attrib = attrib->NextSiblingElement()) {
         std::string key = attrib->Attribute("key");
@@ -238,8 +231,8 @@ void ThingTypeManager::parseItemType(uint16 id, TiXmlElement* elem)
 void ThingTypeManager::addItemType(const ItemTypePtr& itemType)
 {
     uint16 id = itemType->getServerId();
-    if(m_itemTypes.size() <= id)
-        m_itemTypes.resize((id * 3) / 2 + 1, m_nullItemType);
+    if(id > m_itemTypes.size())
+        m_itemTypes.resize(id + 1, m_nullItemType);
     m_itemTypes[id] = itemType;
 }