Core/Groups: Fix UpdatePlayerOutOfRange() not updating some out of range group members

Fix UpdatePlayerOutOfRange() not updating some out of range group members on different maps by also checking if both player and member are on same map.
Core/Calendar: Fix memory leak in CMSG_CALENDAR_ADD_EVENT handler.

Fix memory leak when malformed CMSG_CALENDAR_ADD_EVENT is received.
This properly fixes the memory leak that 51e38872c72e16bb0f09e660c2660759021b2176 tried to fix, reverted in 927f16de49d6cee6562e2d6bc48714572d142c03.