StimFrame: Store ringbuff index as member var

Now each StimFrame knows its index within its parent SpMcRingbuff
object.

stimBuffApis/livoxGen1/pcloudStimulusProducer.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 #include <unistd.h>
 #include <iomanip>
+#include <cstddef>
 #include <user/spMcRingBuffer.h>
 #include <componentThread.h>
 #include <asynchronousLoop.h>
@@ -88,7 +89,7 @@ tempStimulusFrame(
 		0,
 		reinterpret_cast<uint8_t*>(&tempStimulusFrameMem),
 		sizeof(tempStimulusFrameMem)},
-	*smoHooksPtr, 0)
+	*smoHooksPtr, 0, SIZE_MAX)
 {
 	if (smoHooksPtr->OptionParser_getOptions().verbose)
 	{