Manage frame error for B/W camera and continuous acq frame
A bug has been introduced by not managing the soft buffers when pylon cannot a valid acquire an image (e.g due to lost packets). The buffer is re-queued to pylon queue letting lima with an invalid image (or the previous one) in the buffer memory. That create a decrepency between indexes, for instance, if pylon failed at image num 1 and image 2 is ok, image 2 is available in buffer 2 but newFrameReady is fired for image 1, so a client appli requesting image 1 will get buffer 1 where there is a fake image or the previous image due to ring buffer...
We propose to add intermediate small buffer of 2 images, and let pylon only filling the small buffer, then memcopy valid image to the lima buffer