[FIX] base_calender : Fixes the infinite created meeting problem

lp bug: https://launchpad.net/bugs/961094 fixed

bzr revid: jir@jir-desktop-20120323104955-bmnp2j4b9xiuf70w

addons/base_calendar/base_calendar.py

@@ -1002,8 +1002,8 @@ class calendar_event(osv.osv):
             event = datas['id']
             if datas.get('interval', 0) < 0:
                 raise osv.except_osv(_('Warning!'), _('Interval cannot be negative'))
-            if datas.get('count', 0) < 0:
-                raise osv.except_osv(_('Warning!'), _('Count cannot be negative'))
+            if datas.get('count', 0) <= 0:
+                raise osv.except_osv(_('Warning!'), _('Count cannot be negative or 0'))
             if datas['recurrency']:
                 result[event] = self.compute_rule_string(datas)
             else: