cosmetics: Delete empty lines at end of file.

COPYING.LGPLv2.1

doc/avserver.conf

doc/build_system.txt

doc/fate.texi

doc/filters.texi

doc/swscale.txt

doc/viterbi.txt

libavcodec/bfin/dsputil_bfin.c

libavcodec/bfin/fdct_bfin.S

libavcodec/bfin/idct_bfin.S

libavcodec/bfin/mpegvideo_bfin.c

libavcodec/bfin/pixels_bfin.S

libavcodec/bfin/vp3_bfin.c

libavcodec/bfin/vp3_idct_bfin.S

libavcodec/ppc/idct_altivec.c

libavcodec/ps2/dsputil_mmi.c

libavcodec/ps2/idct_mmi.c

libavcodec/ps2/mpegvideo_mmi.c

libavcodec/x86/fdct_mmx.c

libavcodec/x86/fft.c