disabling ac3 decoding regression test (its different between different compilers/platforms due to float use)

Originally committed as revision 1718 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/ffmpeg.regression.ref

@@ -30,4 +30,3 @@ f23a9e50a559e174766ee808c48fea22 *./data/out.yuv
 21f8ff9f1daacd9133683bb4ea0f50a4 *./data/a-mp2.mp2
 116d1290ba1b4eb98fdee52e423417b1 *./data/out.wav
 048b9c3444c788bac6ce5cc3a8f4db00 *./data/a-ac3.rm
-004842f0a35eb3de1f38aec933130d81 *./data/out.wav

tests/regression.sh

@@ -238,7 +238,7 @@ file=${outfile}ac3.rm
 do_ffmpeg $file -y -ab 128 -ac 2 -f s16le  -i $pcm_src -vn $file 
 
 # ac3 decoding
-do_ffmpeg $pcm_dst -y -i $file -f wav $pcm_dst 
+#do_ffmpeg $pcm_dst -y -i $file -f wav $pcm_dst 
 fi
 
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