save a QPixmap object
typo inside comments
refine RoomState::reset()
1. iterate QHash directly. Avoid a duplicated iteration and a QList construction
2. fix a memory leak
iterate m_cards directly
avoid constructing a QList of keys
free ExpPattern created by Engine
in case real memory leaks would be hard to find
avoid constructing a QList
reduce an iteration
Merge branch 'dev' of https://github.com/QSanguosha-Rara/QSanguosha-For-Hegemony.git into dev