[ZPatterns] small ZPatterns bug with Zope 2.4

[Ty Sarna]

> >*shared*
> >DynPersist DynPersist.c -I../../ZODB \
> >-I../../../Components/ExtensionClass/src
> 
> Checked into CVS, with a comment explaining the need to remove "/src" if 
> using a Zope version <2.4.

Actually, how about:

*shared*
DynPersist DynPersist.c -I../../ZODB \
-I../../../Components/ExtensionClass \
-I../../../Components/ExtensionClass/src \

Which should work with either one? (untested)