Issue: get-deps.sh script is not idempotent

host:/tmp/subversion$ ./get-deps.sh
[script output elided]

host:/tmp/subversion$ find . -name apr_hash.c
./apr/tables/apr_hash.c

host:/tmp/subversion$ ./get-deps.sh
[script output elided]

host:/tmp/subversion$ find . -name apr_hash.c
./apr/apr-1.4.6/tables/apr_hash.c
./apr/tables/apr_hash.c

Re-running the script may be necessary in case some packages failed to
download the first time around (zlib in my case, as the current version
is now 1.2.7 instead of 1.2.6).

A proposed patch against SVN is attached. (It also bumps the zlib
version, as that is needed anyway.)

--Daniel

(Please Cc: any replies to me, as I am not subscribed to this list.)

-- 
Daniel Richard G. || skunk_at_iSKUNK.ORG
My ASCII-art .sig got a bad case of Times New Roman.