[PATCH, fortran] Clean-up mpfr (ab)use.

[Jerry DeLisle]

Jerry DeLisle wrote:
---- snip ----
>>
> Sending        ChangeLog
> Sending        arith.c
> Sending        intrinsic.texi
> Sending        simplify.c
> Transmitting file data ....
> Committed revision 136239.
> 
> 
Reverted wrong commit of intrinsic.texi.
Sending        ChangeLog
Sending        intrinsic.texi
Transmitting file data ..
Committed revision 136249.

Jerry