fourcc: allow smaller strings to match FourCC strings
A lot of strings in fourcc_list.h
have a space padding at the end. It should be allowed in all string to vlc_fourcc_t
calls to match the strings with the padding.
This allows to pass the FourCC strings directly in transcode. Just as it's done everywhere else vlc_fourcc_GetCodecFromString() is called.
Edited by Steve Lhomme