Fix logic bug in start level change handling where the active start level
was not getting initialized properly, thus causing it to improperly re-process
bundles on the boundaries of the start level change range. (FELIX-3411)


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1443503 13f79535-47bb-0310-9956-ffa450edef68