Avoid crash of demo2 when weblogo is not available #1
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If weblogo is not available, then PBstat exits with a non 0 code.
Because run_demo2.sh has
set -e
, it exits when it encounter the non 0code of PBstat. Therefore, the demo do not run until the end.
This commit display a message if weblogo is not installed, and allow the
demo to continue.