inflateBackEnd
ZEXTERN int ZEXPORT inflateBackEnd(z_streamp strm);
ret = inflateBackEnd(Z_NULL); assert(ret == Z_STREAM_ERROR);
ret = inflateBackEnd(&strm); assert(ret == Z_OK);
ret = inflateBackEnd(&strm); assert(ret == Z_OK);
inflateBackEnd(&strm);
ZEXTERN int ZEXPORT inflateBackEnd(z_streamp strm);