[patch, fortran] PR 33162 INTRINSIC functions as ACTUAL argument

[Jerry DeLisle]

This patch takes care of the first part of this PR.  It adds checks for double 
precision actual arguments for specific double intrinsic functions.

The patch is self explanatory.

Regression tested on x86-64.

OK for commit?

Jerry

2007-10-26  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/33162
	* intrinsic.h: Add prototypes for two new functions, gfc_check_a_pd
	and gfc_check_fn_d.
	* intrinsic.c (add_functions): Add checks for double precision for dabs,
	dacos, dacosh, dasin, dasinh, datan, datanh, datan2, dbesj0, dbesj1,
	dbesy0, dbesy1, dcos, dcosh, ddim, derf, derfc, dexp, dgamma,
	dlgamma, dlog, dlog10, dmod, dsign, dsin, dsinh, dsqrt, dtan, and dtanh.
	Add check for real for dprod.
	* check.c (gfc_check_a_pd): New function to check for double precision
	argumants. (gfc_check_fn_d): Ditto.
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