Small Bugfix

Very small bugfix! I recently made a new jam project that used the same camera system from Bublime, and while working on it I was able to solve a camera de-sync bug. 

Basically, the camera position is updated every time the player enters a new room, the problem being if the player moves backwards immediately, they're still on the boundary of the previous room, so a "new room entered" trigger can't happen as they've got one foot in the old room. This patch fixes that by also doing a check for room exit, and only moves the camera once there's A), a new room to enter, and B) the player has fully left the previous room.

This should make the game a bit easier to play since it was a pretty frustrating bug to encounter, otherwise it's pretty much the exact same as the submitted jam entry. (Which is still available as build_04)