* commit '0bca0283':
  riff: do not write empty INFO tags

Conflicts:
	tests/ref/fate/vsynth1-cljr
	tests/ref/fate/vsynth1-ffvhuff
	tests/ref/fate/vsynth1-h261
	tests/ref/fate/vsynth1-h263
	tests/ref/fate/vsynth1-h263-obmc
	tests/ref/fate/vsynth1-h263p
	tests/ref/fate/vsynth1-huffyuv
	tests/ref/fate/vsynth1-jpegls
	tests/ref/fate/vsynth1-mjpeg
	tests/ref/fate/vsynth1-mpeg4-adap
	tests/ref/fate/vsynth1-mpeg4-adv
	tests/ref/fate/vsynth1-mpeg4-error
	tests/ref/fate/vsynth1-mpeg4-nr
	tests/ref/fate/vsynth1-mpeg4-qpel
	tests/ref/fate/vsynth1-mpeg4-qprd
	tests/ref/fate/vsynth1-mpeg4-rc
	tests/ref/fate/vsynth1-mpeg4-thread
	tests/ref/fate/vsynth1-msmpeg4
	tests/ref/fate/vsynth1-msmpeg4v2
	tests/ref/fate/vsynth1-rgb
	tests/ref/fate/vsynth1-wmv1
	tests/ref/fate/vsynth1-wmv2
	tests/ref/fate/vsynth1-yuv
	tests/ref/fate/vsynth2-cljr
	tests/ref/fate/vsynth2-ffvhuff
	tests/ref/fate/vsynth2-h261
	tests/ref/fate/vsynth2-h263
	tests/ref/fate/vsynth2-h263-obmc
	tests/ref/fate/vsynth2-h263p
	tests/ref/fate/vsynth2-huffyuv
	tests/ref/fate/vsynth2-jpegls
	tests/ref/fate/vsynth2-mjpeg
	tests/ref/fate/vsynth2-mpeg4-adap
	tests/ref/fate/vsynth2-mpeg4-error
	tests/ref/fate/vsynth2-mpeg4-nr
	tests/ref/fate/vsynth2-mpeg4-qpel
	tests/ref/fate/vsynth2-mpeg4-qprd
	tests/ref/fate/vsynth2-mpeg4-rc
	tests/ref/fate/vsynth2-mpeg4-thread
	tests/ref/fate/vsynth2-msmpeg4
	tests/ref/fate/vsynth2-msmpeg4v2
	tests/ref/fate/vsynth2-rgb
	tests/ref/fate/vsynth2-wmv1
	tests/ref/fate/vsynth2-wmv2
	tests/ref/fate/vsynth2-yuv
	tests/ref/lavf/avi
	tests/ref/seek/h261_avi
	tests/ref/seek/h263_avi
	tests/ref/seek/h263p_avi
	tests/ref/seek/lavf_avi
	tests/ref/seek/mjpeg_avi
	tests/ref/seek/mpeg4_adap_avi
	tests/ref/seek/mpeg4_error_avi
	tests/ref/seek/mpeg4_nr_avi
	tests/ref/seek/mpeg4_qpel_avi
	tests/ref/seek/mpeg4_qprd_avi
	tests/ref/seek/mpeg4_rc_avi
	tests/ref/seek/mpeg4_thread_avi
	tests/ref/seek/msmpeg4_avi
	tests/ref/seek/msmpeg4v2_avi
	tests/ref/seek/wmv1_avi
	tests/ref/seek/wmv2_avi
Merged-by: Michael Niedermayer <michaelni@gmx.at>