OV9782, M0113 Front stereo camera support in SDK 1.4.0+ on VOXL2

[cguzikowski]

I found an issue when trying to use the front stereo setup with 2 OV9782 sensors (camera configuration 12) on a newer SDK (1.4.0+) version. On a fresh install, I ran the command: voxl-configure-cameras 12 and then rebooted. Then when running voxl-camera-server, the following errors and warnings pop up and flood the terminal:

WARNING: preview buffer pool for Cam(stereo), Frame(16) has 0 free, skipping request
ERROR in pipe_server_get_num_clients, channel should be between 0 & 31

Then when trying to view the image previews in the portal, no image appears. Running one camera at a time worked, but

I do not believe this is a hardware issue, as without touching anything, I installed a fresh 1.3.5 image on the system, ran voxl-configure-cameras 12, rebooted, ran voxl-camera-server with no errors, and the image appears just fine in the portal.

One thing that I did notice was that even though there were no images in the 1.4.0 and 1.4.1 portal instances, there were more boxes to check for different image viewings. In the 1.3.5 portal, there was only the option to see 'stereo_grey'