tests/fate-run: Use DEC_OPTS for additional input, too

Should fix failures in the cover-art-flac-remux test.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

tests/fate-run.sh

@@ -232,12 +232,13 @@ transcode(){
     enc_opt=$4
     final_decode=$5
     ffprobe_opts=$7
-    additional_inputs=$8
+    additional_input=$8
+    test -z "$additional_input" || additional_input="$DEC_OPTS $additional_input"
     encfile="${outdir}/${test}.${enc_fmt}"
     test "$6" = -keep || cleanfiles="$cleanfiles $encfile"
     tsrcfile=$(target_path $srcfile)
     tencfile=$(target_path $encfile)
-    ffmpeg -f $src_fmt $DEC_OPTS -i $tsrcfile $additional_inputs \
+    ffmpeg -f $src_fmt $DEC_OPTS -i $tsrcfile $additional_input \
            $ENC_OPTS $enc_opt $FLAGS -f $enc_fmt -y $tencfile || return
     do_md5sum $encfile
     echo $(wc -c $encfile)