Compile fix for 4xx (linuxppc_2_4_devel)

[Cort Dougan]

I can submit patches to break other ports if you'd like that, as well.

} Actually, I'd rather keep it broken until either no one comments on
} Milton's continued patching of this code (and it's implicitily OK'ed,
} and myself or Troy will commit it), or there's comments on his changes
} and ....

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