FYI: Further minor fixes to objc-improvements-branch

[Ziemowit Laski]

These have to do with correctly determining a message receiver type in 
ObjC++ context, as well as allowing C++ operator names in ObjC++ 
selectors:

http://gcc.gnu.org/ml/gcc-cvs/2004-05/msg00845.html

Next on my plate: template support.

Enjoy,

--Zem