Remove some "set but not used" variables

[d binderman]

Hello there,

Please find attached a small patch which removes some trivially
redundant variables from the source code of version 4.5 snapshot 20091105.

Here is a possible ChangeLog entry

2009-11-07  David Binderman <dcb314@hotmail.com>

        * builtins.c (apply_args_size, expand_builtin_mathfn, expand_powi,
        expand_builtin_expect, maybe_emit_sprintf_chk_warning):
        Remove some set but not used variables.
        * calls.c (flags_from_decl_or_type): Same.
        * genautomata.c (check_regexp_units_distribution): Same.

I've built and tested the patch and it seemed ok to me.

Regards

David Binderman
 		 	   		  
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