change perms on /usr/local/lib/node_modules/ only

setup-node-mavericks.bash

@@ -20,5 +20,5 @@ if [ -n "${NODEJS_VER}" ]; then
   curl -fsSL "${NODEJS_REMOTE}" -o "${NODEJS_PKG}"
   sudo /usr/sbin/installer -pkg "${NODEJS_PKG}" -target /
   
-  sudo chown -R $(whoami) /usr/local 2>/dev/null
+  sudo chown -R $(whoami) /usr/local/lib/node_modules/ 2>/dev/null
 fi