[gfortran] PR libfortran/21376

[Tobias Schlüter]

FX Coudert wrote:
> Attached patch fixes PR libfortran/21376 (library called log10 with 
> argument equal to zero). Simple reworking of logic to avoid that.
> 
> Regtesting in progress on i686-linux. OK for 4.0 and mainline?

How about this slightly simpler patch which collects all the special cases in
one place.  Bubblestrapped and tested, OK for 4.0 and mainline?

- Tobi

2005-05-22  Tobias Schl"uter  <tobias.schlueter@physik.uni-muenchen.de>

	PR fortran/21376
	* io/write.c (output_float): Collect all special cases for exponent
	in one place.


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