Fix missing session update in cfg_session method

Author: PCatinean

website_product_configurator/controllers/main.py

@@ -513,12 +513,12 @@ def cfg_session(self, product_id, **post):
             key=lambda obj: obj.attribute_id.sequence
         )
         pricelist = get_pricelist()
-        product_config_session = request.session.get('product_config_session')
-        if (product_config_session and
-                product_config_session.get(product_tmpl_id.id)):
-
+        product_config_session = request.session.get(
+            'product_config_session', {}
+        )
+        if product_config_session.get(str(product_tmpl_id.id)):
             # Bizzappdev end code
-            del product_config_session[product_tmpl_id.id]
+            del product_config_session[str(product_tmpl_id.id)]
             request.session['product_config_session'] = product_config_session
         values = {
             'product_id': product_id,