*: check type based methods are not None

should be same for cases where type based method is a python script, but
is a bit more explicit/safe and consistent with other usages.

bt5/erp5_base/SkinTemplateItem/portal_skins/erp5_base/Entity_sendEmail.py

@@ -30,7 +30,7 @@ mail_message = portal.Base_createMailMessageAsString(
   extra_header_dict=extra_header_dict)
 
 create_post_message_method = event.getTypeBasedMethod('createPostMessage')
-if create_post_message_method:
+if create_post_message_method is not None:
   create_post_message_method(mail_message)
 else:
   # We do not want to retry those activities, as sending email is not transactional safe

bt5/erp5_crm/WorkflowTemplateItem/portal_workflow/event_interaction_workflow/scripts/updateTicket.py

@@ -7,5 +7,5 @@ event = sci['object']
 ticket = event.getFollowUpValue()
 if ticket is not None:
   afterNewEvent = ticket.getTypeBasedMethod('afterNewEvent')
-  if afterNewEvent:
+  if afterNewEvent is not None:
     afterNewEvent(event)

product/ERP5/bootstrap/erp5_core/DocumentTemplateItem/portal_components/document.erp5.DeliveryCell.py

@@ -167,7 +167,7 @@ class DeliveryCell(MappedValue, Movement, ImmobilisationMovement):
                            'isMovingItem')
   def isMovingItem(self, item):
     type_based_script = self._getTypeBasedMethod('isMovingItem')
-    if type_based_script:
+    if type_based_script is not None:
       return type_based_script(item)
     return self.isAccountable()
 

product/ERP5/bootstrap/erp5_core/DocumentTemplateItem/portal_components/document.erp5.DeliveryLine.py

@@ -111,7 +111,7 @@ class DeliveryLine(Movement, XMLMatrix, ImmobilisationMovement):
                            'isMovingItem')
   def isMovingItem(self, item):
     type_based_script = self._getTypeBasedMethod('isMovingItem')
-    if type_based_script:
+    if type_based_script is not None:
       return type_based_script(item)
     return self.isAccountable()
 

product/ERP5/bootstrap/erp5_core/DocumentTemplateItem/portal_components/document.erp5.Movement.py

@@ -236,7 +236,7 @@ class Movement(XMLObject, Amount, CompositionMixin, AmountGeneratorMixin):
                       'isMovingItem')
   def isMovingItem(self, item):
     type_based_script = self._getTypeBasedMethod('isMovingItem')
-    if type_based_script:
+    if type_based_script is not None:
       return type_based_script(item)
     return False
 
@@ -500,7 +500,7 @@ class Movement(XMLObject, Amount, CompositionMixin, AmountGeneratorMixin):
       This will be implemeted by calling currency conversion on currency resources
     """
     type_based_script = self._getTypeBasedMethod('getSourceAssetPrice')
-    if type_based_script:
+    if type_based_script is not None:
       return type_based_script()
     return self._getAssetPrice(section = self.getSourceSectionValue(), date = self.getStartDate())
 
@@ -511,7 +511,7 @@ class Movement(XMLObject, Amount, CompositionMixin, AmountGeneratorMixin):
       Returns the price converted to the currency of the destination section
     """
     type_based_script = self._getTypeBasedMethod('getDestinationAssetPrice')
-    if type_based_script:
+    if type_based_script is not None:
       return type_based_script()
     return self._getAssetPrice(section = self.getDestinationSectionValue(), date = self.getStopDate())