#504 !replay.valid assert failure for netgame

[Tim Payne]

I clicked the view film button by mistake when trying to join the metaserver, and double clicked on a film. I didn't have the map required for the film, so it gave me an error. I went back to the title screen and joined the metaserver and joined a game. When the game started I got an !replay.valid assertion failure and had to restart. No one else in the game was affected.