Fix CUIMainIngameWnd xml section loading

From the standard: "If a call to sprintf or snprintf causes copying to
take place between objects that overlap, the behavior is undefined."

src/xrGame/ui/UIMainIngameWnd.cpp

@@ -235,11 +235,10 @@ void CUIMainIngameWnd::Init()
         m_quick_slots_icons.push_back(new CUIStatic());
         m_quick_slots_icons.back()->SetAutoDelete(true);
         AttachChild(m_quick_slots_icons.back());
-        string32 path;
-        xr_sprintf(path, "quick_slot%d", i);
-        CUIXmlInit::InitStatic(uiXml, path, 0, m_quick_slots_icons.back());
-        xr_sprintf(path, "%s:counter", path);
-        UIHelper::CreateStatic(uiXml, path, m_quick_slots_icons.back());
+        std::string path = "quick_slot" + std::to_string(i);
+        CUIXmlInit::InitStatic(uiXml, path.c_str(), 0, m_quick_slots_icons.back());
+        path += ":counter";
+        UIHelper::CreateStatic(uiXml, path.c_str(), m_quick_slots_icons.back());
     }
     m_QuickSlotText1 = UIHelper::CreateTextWnd(uiXml, "quick_slot0_text", this);
     m_QuickSlotText2 = UIHelper::CreateTextWnd(uiXml, "quick_slot1_text", this);