The ithread_exit wrapper function behaves inconsistently across
platforms; on windows, the argument is a thread handle, denoting
the thread that will be exited. On pthreads, ithread_exit only
terminates the current thread, not any other thread.
These both calls are at the end of each thread function (and the one
with a non-null parameter refers to the handle of the thread itself),
so the thread will exit immediately anyway.
Change-Id: I21e43c56874729452bd80b28ff351e3c5d3f087e
Fixed the following bugs
Issue 21145276
Issue 21144884
Issue 21181133
Issue 21181134
Decoder now returns error if the level in stream is higher than level at init
Change-Id: I8892c62bd98f7854d046510330c05a1e9ca826b2
