[FFmpeg-cvslog] tests: drop bc dependency

[Clément Bœsch]

ffmpeg | branch: master | Clément Bœsch <u at pkh.me> | Mon Jan 19 22:56:59 2015 +0100| [d47eeff2741a9ad9eb4398c1d844dd4f638d6ee4] | committer: Clément Bœsch

tests: drop bc dependency

We already have a dependency on awk and bc is sometimes not found in the
base system.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d47eeff2741a9ad9eb4398c1d844dd4f638d6ee4
---

 tests/fate-run.sh |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/fate-run.sh b/tests/fate-run.sh
index f78e4fc..c7b2922 100755
--- a/tests/fate-run.sh
+++ b/tests/fate-run.sh
@@ -38,7 +38,7 @@ target_path(){
 # $1=value1, $2=value2, $3=threshold
 # prints 0 if absolute difference between value1 and value2 is <= threshold
 compare(){
-    echo "scale=2; v = $1 - $2; if (v < 0) v = -v; if (v > $3) r = 1; r" | bc
+    awk "BEGIN { v=$1-$2; printf ((v<0?-v:v) > $3) }"
 }
 
 do_tiny_psnr(){