[krbdev.mit.edu #3522] Error code definitions are outside macros to prevent multiple inclusion in public headers

[Alexandra Ellwood via RT]

For example in krb5.h the error codes are appended after the "#endif /* KRB5_GENERAL__ */"

This isn't actually causing problems for normal usage of our headers.  However, I want to switch 
to using these headers on KfM (rather than the ones KfM autogenerates for itself).  Having the 
error code definitions outside the macros to prevent multiple inclusion would be a change from 
what KfM's headers do.