Possible memory leak in libkita_child_del()

[domsson]

From the current rewrite (branch kita) of succade, see this valgrind log:

==32259== HEAP SUMMARY:
==32259==     in use at exit: 438 bytes in 12 blocks
==32259==   total heap usage: 326 allocs, 314 frees, 146,022 bytes allocated
==32259== 
==32259== 438 (24 direct, 414 indirect) bytes in 1 blocks are definitely lost in loss record 8 of 8
==32259==    at 0x4838D7B: realloc (vg_replace_malloc.c:836)
==32259==    by 0x4868F5C: libkita_child_del (libkita.c:493)
==32259==    by 0x4869F2D: kita_child_del (libkita.c:1372)
==32259==    by 0x4869D08: kita_child_free (libkita.c:1287)
==32259==    by 0x486A202: kita_free (libkita.c:1534)
==32259==    by 0x10FD03: main (succade.c:1376)
==32259== 
==32259== LEAK SUMMARY:
==32259==    definitely lost: 24 bytes in 1 blocks
==32259==    indirectly lost: 414 bytes in 11 blocks
==32259==      possibly lost: 0 bytes in 0 blocks
==32259==    still reachable: 0 bytes in 0 blocks
==32259==         suppressed: 0 bytes in 0 blocks
==32259== 

Possibly a memory leak in libkita? Something to investigate.