fix getSize on empty data array

bt5/erp5_wendelin/DocumentTemplateItem/portal_components/document.erp5.DataArray.py

@@ -101,7 +101,11 @@ class DataArray(BigFile):
     """
        Implement getSize interface for ndarray
     """
-    return self.getArray().nbytes
+    array = self.getArray()
+    if array is None:
+      return 0
+    else:
+      return self.getArray().nbytes
 
   security.declareProtected(Permissions.AccessContentsInformation, 'getArrayShape')
   def getArrayShape(self):

bt5/erp5_wendelin/DocumentTemplateItem/portal_components/document.erp5.DataArray.xml

@@ -46,9 +46,9 @@
             <key> <string>text_content_warning_message</string> </key>
             <value>
               <tuple>
-                <string>W:114, 42: Redefining built-in \'format\' (redefined-builtin)</string>
-                <string>W:131,  4: Redefining built-in \'range\' (redefined-builtin)</string>
-                <string>W:158, 10: No exception type(s) specified (bare-except)</string>
+                <string>W:118, 42: Redefining built-in \'format\' (redefined-builtin)</string>
+                <string>W:135,  4: Redefining built-in \'range\' (redefined-builtin)</string>
+                <string>W:162, 10: No exception type(s) specified (bare-except)</string>
               </tuple>
             </value>
         </item>