Fix various memory access problems detected by valgrind

src/player.cpp

@@ -34,9 +34,13 @@ Player::Player(IGameDef *gamedef):
 	is_climbing(false),
 	swimming_vertical(false),
 	camera_barely_in_ceiling(false),
+	light(0),
 	inventory(gamedef->idef()),
 	hp(PLAYER_MAX_HP),
+	hurt_tilt_timer(0),
+	hurt_tilt_strength(0),
 	peer_id(PEER_ID_INEXISTENT),
+	keyPressed(0),
 // protected
 	m_gamedef(gamedef),
 	m_breath(-1),