examples: chase cacc8e35

../examples/dav1dplay.c:1030:5: warning: implicit declaration of function 'init_demuxers' is invalid in C99 [-Wimplicit-function-declaration]
    init_demuxers();
    ^
/usr/bin/ld.bfd: examples/c590b3c@@dav1dplay@exe/dav1dplay.c.o: in function `decoder_thread_main':
dav1dplay.c:(.text+0x1243): undefined reference to `init_demuxers'
cc: error: linker command failed with exit code 1 (use -v to see invocation)