Take a softer approach to unused symbols.
Take a softer approach to unused symbols.

* libsvn_delta/compose_delta.c: Remove #if 0/#endif pairs, and "use" the
symbols that were commented out instead.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@842163 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion