[Vm-dev] [OpenSmalltalk/opensmalltalk-vm] Restore support for large cursor on linux X11 VM (#424)

[David T Lewis]

The only real problem is that the VM is not issuing an understandable error message in the case of a missing runtime library. For example, if the VM module-display-X11 module requires runtime library libXrender, and if libXrender.so is not installed, then a message like this would be sufficient:

$ squeak myImage
failed loading module /usr/local/lib/squeak/4.16.6-3772/so.vm-display-X11 due to libXrender.so.1: cannot open shared object file: No such file or directory
could not find display driver vm-display-X11; either:
  - check that /usr/local/lib/squeak/4.16.6-3772/vm-display-X11.so exists, or
  - use the '-plugins <path>' option to tell me where it is, or
  - remove DISPLAY from your environment.
Aborted (core dumped)

I can make this work on interpreter VM (SVN trunk) but module loading seems to have changed on oscog and I have not yet been able to make it work here. More to follow.

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