xmi.h doesn't compile with c++

[Johannes Zellner]

Hi,

in <ggi/xmi.h>, there's 

    1) an unmatched ___BEGIN_DECLS (a missing ___END_DECLS)
    2) a pair __BEGIN_DECLS __END_DECLS which should probably
       be ___BEGIN_DECLS ___END_DECLS instead.

-- 
   Johannes