[PATCH, fortran] Fix a few PRs.

[Steve Kargl]

2007-11-28  Steven G. Kargl  <kargls@comcast.net>

	PR fortran/34230
	* fortran/arith.c (gfc_check_real_range): Set intermediate values
	to +-Inf and 0 when -fno-range-check is in effect.
	* gfortran.dg/real_const_3.f90: Fix up for new range-check handling.

	* fortran/invoke.texi: Document the C escaped characters activated
	by -fbackslash.  Improve -fno-range-check description.

	PR libfortran/33583
	* libgfortran/gfortran.map: Add tgammaf.
	* gfortran.dg/gamma_5.f90: Remove xfail.

-- 
Steve
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