bail out of search page if there is an error

if there's an error don't try and process areas etc, just display the
form

hub/views/area.py

@@ -462,6 +462,9 @@ def get_context_data(self, **kwargs):
                     "error"
                 ] = f"Sorry, we can’t find any matches for “{search}”. Try a nearby town or city?"
 
+        if context.get("error") is not None:
+            return context
+
         if context["areas"] is not None and len(context["areas"]):
             # Add MPs and PPCs to areas
             for area in context["areas"]: