gif_writers.py uses an undefined constant

[TheRushingWookie]

Hi, my linter turned up an undefined variable found in your library when i was browsing through it

line 161/162 in gif_writers.py

        proc1 = sp.Popen(cmd1+['-r', "%.02f"%fps, filename],
                         stdin=sp.PIPE, stdout=DEVNULL)

should be

        proc1 = sp.Popen(cmd1+['-r', "%.02f"%fps, filename],
                         stdin=sp.PIPE, stdout=os.devnull)

[Zulko]

Thanks ! That's a blunder I made when reorganizing the code, it is now fixed. Just so you know, I actually use two devnulls, os.devnull in Python 2 or subprocess.DEVNULL in Python 3, hence the generic DEVNULL constant.