[gdome]Constant for no Exception

[Tobias Peters <t-peters gmx de>]

Hi,

I think there should be a constant for indicating that no exception has
been raised. This could be used by applications to initialize the variable
used for Exception tracking.

An obvious choice would be 0, as used by some of the test programs, but
this is already used to indicate UNSPECIFIED_EVENT_TYPE_ERR.

I'd like to see
GDOME_NO_ERR = (GdomeException)(-1)
included in GdomeExceptionCode.

Bye,
Tobias