[fortran, patch] PR31919, ice if array arguments are not conformable

[Daniel Franke]

This patch adds a check for array conformance to the MIN/MAX family of 
intrinsics:

$> cat pr31919.f90
integer :: a(2, 2), b(2)
print *, min(a, b)
end

$> gfortran-svn pr31919.f90
pr31919.f90:2.13:

print *, min(a, b)
            1
Error: Incompatible ranks in min at (1)


:ADDPATCH fortran:

gcc/fortran
2007-05-14  Daniel Franke  <franke.daniel@gmail.com>

        PR fortran/31919
        * check.c (check_rest): Added check for array conformance.

gcc/testsuite
2007-05-14  Daniel Franke  <franke.daniel@gmail.com>

        PR fortran/31919
        * gfortran.dg/pr31919.f90: New test.


Regression tested on i686-pc-linux-gnu without regressions. 
Ok for trunk and 4.2 after re-opening?

Regards
	Daniel
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