realpath memory leak

[jon-da-thon]

hey- patched a small memory leak

before:
==400== LEAK SUMMARY:
==400==    definitely lost: 32,768 bytes in 8 blocks
==400==    indirectly lost: 0 bytes in 0 blocks
==400==      possibly lost: 0 bytes in 0 blocks
==400==    still reachable: 667,216 bytes in 7 blocks
==400==         suppressed: 0 bytes in 0 blocks
after:
==492==    definitely lost: 0 bytes in 0 blocks
==492==    indirectly lost: 0 bytes in 0 blocks
==492==      possibly lost: 0 bytes in 0 blocks
==492==    still reachable: 667,216 bytes in 7 blocks
==492==         suppressed: 0 bytes in 0 blocks