Bug 574729 - avoid calling System::setSecurityManager with null Change-Id: I22b97871a6348c76ee48a380bf48670dd81aa9b4 Signed-off-by: Thomas Watson <tjwatson@us.ibm.com> Reviewed-on: https://git.eclipse.org/r/c/equinox/rt.equinox.framework/+/182992 Tested-by: Equinox Bot <equinox-bot@eclipse.org>