[omniORB] Buglet in compiled idl stub code

[CHRISTOPHER WOOD]

idl looking somthing like:

const unsigned long nVal = 0x80000000;

will compile to (somthing like):

const CORBA::ULong nVal = 4294967296;

rather than:

const CORBA::ULong nVal = 4294967296ul;

not much of a problem realy, most compilers just emit a warning and go on
with it, still should be pretty trivial to fix.

I would have fixed it and sent a patch eventualy but probably not before
2.6.0 is released.