Followup to r14203.
Fix indentation (sigh) and tell emacs how to do it next time.
Use VG_(realloc) instead of VG_(arena_realloc).
Use 500 as an initial buffer size which is already quite generous. 
PATH_MAX which is 4096 on linux is clearly overkill.


git-svn-id: svn://svn.valgrind.org/valgrind/branches/BUF_REMOVAL@14574 a5019735-40e9-0310-863c-91ae7b9d1cf9
Replace one more VG_(arena_realloc).


git-svn-id: svn://svn.valgrind.org/valgrind/branches/BUF_REMOVAL@14575 a5019735-40e9-0310-863c-91ae7b9d1cf9