Patch alpha0.417 - fixed lobby re-entry crash

- Change Log -

• Fixed crash caused by changing the map in  a private lobby and returning to the lobby after playing a match
• fixed the Server population counter being able to be less than  0 when detecting someone disconnecting from it
•  buffed machine gun damage form 90 to 120
• nerfed sniper damage from 1000 to 850

**Please download the most up to date Game build to be able access the Conquest server and matchmaking features.**