sanity check n_numaux

Sanity check aux entries used by PE to extend a C_FILE name.  See
coffswap.h:coff_swap_aux_in.  The existing check only catered for
n_numaux == 1.

	* coffcode.h (fill_comdat_hash): Properly sanity check n_numaux.
	Formatting.
	(handle_COMDAT): Formatting.