Merge pull request #12 from 9000h/Switch-to-posix-compaatible-sched_yield

Switch to posix compatible sched_yield

audio.c

@@ -51,6 +51,7 @@
 #include <string.h>
 #include <math.h>
 #include <sys/prctl.h>
+#include <sched.h>
 
 #include <libintl.h>
 #define _(str) gettext(str)             ///< gettext shortcut
@@ -1545,7 +1546,7 @@ static int OssThread(void)
         if (err < 0) {                  // underrun error
             return -1;
         }
-        pthread_yield();
+        sched_yield();
         usleep(OssFragmentTime * 1000); // let fill/empty the buffers
         return 0;
     }