Replace wrong usage of False by None

issue2512

product.py

@@ -112,7 +112,7 @@ class Template(ModelSQL, ModelView):
         if default is None:
             default = {}
         default = default.copy()
-        default['products'] = False
+        default['products'] = None
         return super(Template, self).copy(ids, default=default)
 
 Template()
@@ -178,7 +178,7 @@ class Product(ModelSQL, ModelView):
         if default is None:
             default = {}
         default = default.copy()
-        default['products'] = False
+        default['products'] = None
         new_ids = []
         for product in self.browse(ids):
             default['template'] = template_obj.copy(product.template.id)

uom.py

@@ -198,7 +198,7 @@ class Uom(ModelSQL, ModelView):
                 amount = self.round(amount, to_uom.rounding)
         return amount
 
-    def compute_price(self, from_uom, price, to_uom=False):
+    def compute_price(self, from_uom, price, to_uom=None):
         """
         Convert price for given uom's.