several initial values and ensure group
fix crash in GROUP_REQUEST_JOIN_AGREE
fix crash in GROUP_REQUEST_JOIN_AGREE
fix crash in GROUP_REQUEST_JOIN_AGREE
don't free group when gmsg->type == GROUP_REQUEST_JOIN_AGREE || gmsg->type == GROUP_REQUEST_JOIN_DENY
don't free group on GROUP_LEAVE when not is_myself
Merge pull request #200 from felixonmars/dev

catch up on some initial values and fix crash on GROUP_LEAVE