[gfortran] Minor cleanup to trans-intrinsic.c

[Paul Brook]

> 2006-02-07  Tobias Schl"uter  <tobias.schlueter@physik.uni-muenchen.de>
>
> 	* f95-lang.c (gfc_init_builtin_functions): Define BUILT_IN_TRUNC
> 	and BUILT_IN_TRUNCF instead of BUILT_IN_FLOOR and BUILT_IN_FLOORF.
> 	* trans-intrinsic.c (build_fix_expr): Change 'op' argument
> 	to correct enum type.
> 	(gfc_conv_intrinsic_aint): Likewise.  Clarify comment in front of
> 	function.  Add default case to switch, deal with FIX_TRUNC_EXPR
> 	instead of FIX_FLOOR_EXPR.

Ok.

Paul