Memory Error---testGrid

[shaomeng]

Utility program testGrid has 3 definitely lost memory blocks:

==150751== HEAP SUMMARY:
==150751==     in use at exit: 1,480 bytes in 18 blocks
==150751==   total heap usage: 38,371 allocs, 38,353 frees, 9,042,495 bytes allocated
==150751== 
==150751== LEAK SUMMARY:
==150751==    definitely lost: 1,248 bytes in 3 blocks
==150751==    indirectly lost: 232 bytes in 15 blocks
==150751==      possibly lost: 0 bytes in 0 blocks
==150751==    still reachable: 0 bytes in 0 blocks
==150751==         suppressed: 0 bytes in 0 blocks
==150751== Rerun with --leak-check=full to see details of leaked memory
==150751== 
==150751== For lists of detected and suppressed errors, rerun with: -s
==150751== ERROR SUMMARY: 13 errors from 1 contexts (suppressed: 0 from 0)