configure: add CONFIG_WMA_FREQS for libavcodec to avoid build failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37264 b3059339-0415-0410-9bf9-f77b7e298cf2
Ensure isprint only gets input it can handle.

Patch by [spunit262 gmail.com].

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37265 b3059339-0415-0410-9bf9-f77b7e298cf2