[gfortran,patch] Fix constant exponentiation with integer exponent

[FX Coudert]

> Well I tried again and I get massive memory usage and runaway  
> processes.  The culprit is f951 when trying to compile  
> integer_exponentiation_3.F90.
>
> The patch went in clean and built fine, but it no worky here.  I  
> must be missing something.
>
> X86-64-Gnu/Linux

Regtested fine on x86_64-linux, both with -m32 and -m64 (Scientific  
Linux SL release 4.3 / glibc-2.3.4). Don't know what I can do. What  
GMP/MPFR version do you have? Did you run "make check" on it? If you  
set memory limits, what function is running when the limit is reached?

Thanks, and sorry we have to go through all this,
FX