[FIX] web: company_logo route may be accessed with uid = False in some cases, it should still work

bzr revid: odo@openerp.com-20130404143144-3o2j0xbwh4m84tu8

addons/web/controllers/main.py

@@ -1371,7 +1371,7 @@ class Binary(openerpweb.Controller):
         elif dbname is None:
             dbname = db_monodb(req)
 
-        if uid is None:
+        if not uid:
             uid = openerp.SUPERUSER_ID
 
         if not dbname: