pnm.c:228: warning: implicit declaration of function 'usec_sleep'
realrtsp/rtsp.c:184: warning: implicit declaration of function 'usec_sleep'
ad_acm.c:149: warning: implicit declaration of function 'usec_sleep'
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17093 b3059339-0415-0410-9bf9-f77b7e298cf2