Backport of Revision 926657

Fixing implementation of doSave(bool, Incidence*)

Current implementation results in an endless recursion (method calling itself).
This is just never triggered because the subclasses, especially ResourceCached override it.

Call doSave(bool) instead. This also matches the behavior it is said to have according to the API docs

svn path=/branches/KDE/4.2/kdepimlibs/; revision=926658