tree 3242b24ff6220e387775d3eeb68bdd735f7a8eb8
parent c0ae0a9a8d5dfb25b9a819f25821a4662a8b1a05
author Shawn O. Pearce <sop@google.com> 1306890213 -0700
committer Shawn O. Pearce <sop@google.com> 1307026080 -0700

Make engine, code protected in PrologControl

These don't need to be visible outside of the control object,
or its direct subclasses.