:ADDPATCH exception handling:

The attached patch fixes compiling the exception handling logic with a
C++ compiler. It is by far the most invasive patch for full C++
compatibility, as I had to rename members to avoid C++ keywords and
reorganize struct names due to the lack of separate struct namespace in
C++- But the individual changes themselves are trivial, and only 4 files
are affected.

Bootstrapped on i686, testing still running. Ok if it succeeeds?

Thomas


* except.h: Distinguish between struct eh_region_def and eh_region.
* except.c: Likewise.
* tree-eh.c: Likewise.
* tree-cfg.c: Likewise.

* except.c: Move eh_region_type out of struct namespace.Avoid C++
keywords. Use type safe memory macros.
* tree-eh.c: Move goto_queue_node out of struct namespace. Avoid C++
keywords.
* tree-cfg.c: Cast as needed. Use type safe memory macros.