Some debugging for CUDA mem leak

gprMax/model_build_run.py

@@ -19,6 +19,7 @@
 import datetime
 import itertools
 import logging
+import subprocess
 import sys
 
 import humanize
@@ -351,6 +352,7 @@ class ModelBuildRun:
         logger.info(
             f"Time taken: " + f"{humanize.precisedelta(datetime.timedelta(seconds=solver.solvetime), format='%0.4f')}"
         )
+        logger.info(subprocess.check_output(["nvidia-smi"], shell=False, stderr=subprocess.STDOUT))
 
 
 class GridBuilder: