src/misc/fourcc.c: do not break some MPEG2 videos

Bug introduced in commit 87cd07ca3ae1ee3eeb59c8f6a659180ba85795d8
input core: add status field per elementary stream

VLC has status reporting on the input state, but not on the output state.
This makes it impossible to know if playback actually started completely from
checking stream status states.

For instance a failed audio output cannot be determined programatically. This
patch adds an extra field per ES (in src/input/es_out.c) to determine the state
of that ES (DISABLE, ENABLED, ERROR).

If CreateDecoder() cannot instantiate an output, then it set p_dec->b_error = true.
This is used to determine what the return value for es_out_GetEsState() should be.
If p_dec->b_error is true, then it returns an ES_OUT_STATE_ES_ERROR to the caller.
Else it returns ES_OUT_STATE_ES_ENABLED or ES_OUT_STATE_ES_DISABLED.

A function 'es_out_GetEsState()' is available to query an input for the state of
the primary audio, video and SPU elementary streams.
demuxers: adjust es_out_Control( out, ES_OUT_GET_ES_STATE, ... ) to new protytpe

This patch depends on "input core add status field per elementary stream".
lua: report status of main ES-es on current input.
Revert "lua: report status of main ES-es on current input."

This reverts commit b978c15a594f71ec07526beb7fe4101195e0c9af.
Revert "demuxers: adjust es_out_Control( out, ES_OUT_GET_ES_STATE, ... ) to new protytpe"

This reverts commit 1ac11c9893222a5056b5963f9da39cba5d2b0468.
Revert "input core: add status field per elementary stream"

This reverts commit d8199d8cbe0e4e3f4920580c4735364a4664fc7e.