Stenzek 6a0067fd26 FrameDump: Set first_frame if movie frame number <= 1
The frame number is incremented before the first frame is swapped out.

Fixes ffmpeg creating invalid video files on output if the emulator only
runs for a single frame, e.g. FifoCI.
2019-12-22 11:54:34 +10:00
..
2019-05-08 23:59:04 +02:00