Fix problem with constant modulus

[Richard Kenner]

    /gcc/dje/build/powerpc-ibm-aix5.1.0.0-20040420/powerpc-ibm-aix5.1.0.0/power/libstdc++-v3/include/bits/locale_facets.tcc:59: internal compiler error: in
    final_scan_insn, at final.c:2507
    
    	Please fix or revert your change.

I'll be glad to fix it (though it looks like an unrelated latent problem),
but I'm not familiar with that part of the build environment.  Can you send
me the preprocessed source?

Thanks.