FATE: do not decode audio in the nuv test.

We already have sufficient coverage for 16-bit pcm.

tests/fate/video.mak

@@ -144,7 +144,7 @@ fate-mpeg2-field-enc: CMD = framecrc -flags +bitexact -dct fastint -idct simple
 
 # FIXME dropped frames in this test because of coarse timebase
 FATE_TESTS += fate-nuv
-fate-nuv: CMD = framecrc -idct simple -i $(SAMPLES)/nuv/Today.nuv
+fate-nuv: CMD = framecrc -idct simple -i $(SAMPLES)/nuv/Today.nuv -an
 
 FATE_TESTS += fate-qpeg
 fate-qpeg: CMD = framecrc -i $(SAMPLES)/qpeg/Clock.avi -an -pix_fmt rgb24

tests/ref/fate/nuv

 #tb 0: 1/1000
-#tb 1: 1/44100
-1,          0,          0,     1024,     4096, 0x00000000
-1,       1024,       1024,     1024,     4096, 0x4dfae7a6
-1,       2048,       2048,     1024,     4096, 0x3fd9f5c6
-1,       3072,       3072,     1024,     4096, 0x7b86e310
-1,       4096,       4096,     1024,     4096, 0x611cece5
-1,       5120,       5120,     1024,     4096, 0xb7d8e872
 0,        118,        118,        0,   460800, 0x54aedafe
-1,       6144,       6144,     1024,     4096, 0x072ef72b
 0,        152,        152,        0,   460800, 0xb7aa8b56
-1,       7168,       7168,     1024,     4096, 0xb3560144
 0,        177,        177,        0,   460800, 0x283ea3b5
-1,       8192,       8192,     1024,     4096, 0x0a3d119e
 0,        202,        202,        0,   460800, 0x283ea3b5
-1,       9216,       9216,     1024,     4096, 0xbe391aa4
-1,      10240,      10240,     1024,     4096, 0x28f7c6e5
 0,        235,        235,        0,   460800, 0x10e577de
-1,      11264,      11264,     1024,     4096, 0xca9d9df2
 0,        269,        269,        0,   460800, 0x4e091ee2
-1,      12288,      12288,     1024,     4096, 0x5c6b95a9
-1,      13312,      13312,     1024,     4096, 0x0bdfc0bf
 0,        302,        302,        0,   460800, 0x2ea88828
-1,      14336,      14336,     1024,     4096, 0xd95a9277
 0,        335,        335,        0,   460800, 0x4b7f4df0
-1,      15360,      15360,     1024,     4096, 0xae2bef2c
 0,        369,        369,        0,   460800, 0xb30eb322
-1,      16384,      16384,     1024,     4096, 0xbf031e83
-1,      17408,      17408,     1024,     4096, 0x4c83e2d1