postler service fail

[Gianmarco Brocchi]

I compile the last postler's version from git (commit c1dbb6e430452dab7f93ed84aeaa4a47d7c4c007).
All works (after some fix for Python 3), but when I run postler it seems doesn't managed to create the account folder in ~/.cache/postler/mail/, infact it print:

 [postler-service] Index can't be setup: Failed to open database: unable to open database file
 [...]
 [postler-service] postler_postler_service_get_messages: assertion `_tmp1_ != NULL' failed
 [postler-service] postler_postler_service_unread_messages: assertion `_tmp1_ != NULL' failed

I use Gnome 3 (gnome-shell 3.0.2-2) and Vala-git (vala-git 20110820-1, Vala 0.13.2.8-965782).