Change direct prediction for fast first pass to automatic as all other presets

use this mode and it has to be enabled in the first pass to be used in the
second


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@16474 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

ffpresets/libx264-fastfirstpass.ffpreset

@@ -15,6 +15,6 @@ qmin=10
 qmax=51
 qdiff=4
 refs=1
-directpred=1
+directpred=3
 trellis=0
 flags2=-bpyramid-wpred-mixed_refs-dct8x8+fastpskip