fix trace output to be in line with Flash player 9
fix trace output to be in line with Flash player 9

something returns Infinity and not NaN in Flash player 7.
You get it when running Number.valueOf(), but I'm not sure exactly who's at fault.

mltframework/swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,mltframework/swfdec,freedesktop-unofficial-mirror/swfdec__swfdec