[FIX] stock_inventory: only set to done adjustment if there is an adj…

…ustment

stock_inventory/models/stock_quant.py

@@ -51,7 +51,7 @@ def _apply_inventory(self):
                 }
             )
             rec.to_do = False
-            if self.env.company.stock_inventory_auto_complete:
+            if adjustment and self.env.company.stock_inventory_auto_complete:
                 adjustment.action_auto_state_to_done()
         return res