xGEDMD(Q): silence warning with 64-bit integers

[christoph-conrads]

Fix the following warning by GCC 12.2.0 when building with 64-bit integers (e.g., when BUILD_INDEX64_EXT_API=ON):

Warning: Use of the NUMERIC_STORAGE_SIZE named constant from intrinsic module ISO_FORTRAN_ENV at (1) is incompatible with option -fdefault-integer-8 

References:

• Stack Overflow thread ISO_FORTRAN_ENV or -fdefault-real-8 to promote reals to double precision

Checklist

• The documentation has been updated.
• If the PR solves a specific issue, it is set to be closed on merge.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (fe843f9) to head (e02fbda).

Additional details and impacted files

@@ Coverage Diff @@ ## master #993 +/- ## ======================================= Coverage 0.00% 0.00% ======================================= Files 1929 1929 Lines 190635 190635 ======================================= Misses 190635 190635 

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