player: Fix strange volume bug
player: Fix strange volume bug

On one of my machines the first song plays fine, but every track
thereafter fails playing with the following error message:

[volume @ 0x7f6b1c0a1200] [Eval @ 0x7f6b21ab6b60] Invalid chars '.0' at the end of expression '1.0'
[volume @ 0x7f6b1c0a1200] Error when evaluating the volume expression '1.0'
/!\ create_filter volume (Das Argument ist ungültig)

I’m not sure why this fixes the issue, but it might be a bug in ffmpeg.

tchajed/pianobar,DavidZemon/pianobar,gnowxilef/pianobar,tchajed/pianobar,johndeeney/pianobar,johnso51/pianobar,johndeeney/pianobar,DavidZemon/pianobar,DavidZemon/pianobar,johnso51/pianobar,tchajed/pianobar,johnso51/pianobar,gnowxilef/pianobar,tchajed/pianobar,DavidZemon/pianobar,johndeeney/pianobar,johnso51/pianobar,gnowxilef/pianobar,DavidZemon/pianobar,johnso51/pianobar,johndeeney/pianobar,johndeeney/pianobar,gnowxilef/pianobar,gnowxilef/pianobar,gnowxilef/pianobar,tchajed/pianobar,DavidZemon/pianobar,tchajed/pianobar,johndeeney/pianobar,johnso51/pianobar