Remove double product with multiple backends

weboob/applications/comparoob/comparoob.py

@@ -92,6 +92,12 @@ class Comparoob(ReplApplication):
     def do_prices(self, pattern):
         products = []
         for backend, product in self.do('search_products', pattern):
+            double = False
+            for prod in products:
+                if product.name == prod.name:
+                    double = True
+                    break
+            if not double:
                 products.append(product)
 
         product = None