function: CS104_Slave_startThreadless() may has a bug in it

[tangkai-prc]

when
#if (CONFIG_USE_THREADS == 1)
self->isThreadlessMode = true;
#endif
is this a clerical error when USE_THREADS == 1? I think it is be better return when CONFIG_USE_THREADS == 1 as below:
#if (CONFIG_USE_THREADS == 1)
self->isThreadlessMode = false;
self->isStarting = false;
return ;
#endif

[mzillgith]

The idea is that when compiling the library with thread support (CONFIG_USE_THREADS) it is still possible using it without the library creating its own threads. Not sure if there are many use cases for this.