Revert "decoder: fix signal call from input_DecoderFlush"
Revert "decoder: fix signal call from input_DecoderFlush"

Decoder still need to be signaled when FIFO is already empty.

This reverts commit 32040fdcb8c8bbafb44e73bed15df0e69f78ff88.

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc