[OpenSmalltalk/opensmalltalk-vm] 12bf6b: CameraPlugin as per Name: VMMaker.oscog-eem.2841

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[OpenSmalltalk/opensmalltalk-vm] 12bf6b: CameraPlugin as per Name: VMMaker.oscog-eem.2841

Eliot Miranda-3
  Branch: refs/heads/Cog
  Home:   https://github.com/OpenSmalltalk/opensmalltalk-vm
  Commit: 12bf6b0a884ebeb5c5bc31527467ef95d348f6d9
  Author: Eliot Miranda <[hidden email]>
  Date:   2020-10-16 (Fri, 16 Oct 2020)

  Changed paths:
    M platforms/Cross/plugins/CameraPlugin/CameraPlugin.h
    M platforms/iOS/plugins/CameraPlugin/AVFoundationVideoGrabber.m
    M platforms/unix/plugins/CameraPlugin/sqCamera-linux.c
    M platforms/win32/plugins/CameraPlugin/winCameraOps.cpp
    M src/plugins/CameraPlugin/CameraPlugin.c

  Log Message:
  CameraPlugin as per Name: VMMaker.oscog-eem.2841

CameraPlugin: Answer a getter for the semaphoreIndex to allow for a convenient
interrupt-driven waitForCameraStart: interface. Check the cameraNum argument is
in range in the Unix primitives.  Fix a failure to set the semaphore on windows
when attempting to set teh semaphore before the arrival of the first frame.