am ca4603db: SDK: fix NPE in AVD Manager > Start when skin.path is missing.

Merge commit 'ca4603db2fa5cd0231d75ebcef239cd69e1772ad' into eclair

* commit 'ca4603db2fa5cd0231d75ebcef239cd69e1772ad':
  SDK: fix NPE in AVD Manager > Start when skin.path is missing.