Erreur "no attribute 'value'" in set_var_size function with the Mascaret api

The found error is : ERROR script: 'int' object has no attribute 'value'

It comes from bad variables which are used in the self.logger.debug function

The correction in the set_var_size function is :

self.logger.debug('size = {} {} {}.'
                          .format(size1_c.value, size2_c.value, size3_c.value))