GCC 3.4 fails to build eval.c when --disable-deprecated is used

[Andreas Vögele]

[Sorry, it seems that my new MUA doesn't complain when sending a 
message without subject.]

If Guile CVS is built with --disable-deprecated GCC 3.4 fails to build 
eval.c.  The problem is that the function scm_macroexp(), which is used 
in line 1941 of eval.c, is not declared. The prototype is not declared 
in eval.h if deprecated functions are disabled and the function 
definition starts further below in line 2131. I solved this problem 
locally by adding a forward declaration to eval.c.