search: Fix crash when disabling a stockpile category

Closes #678

NEWS

@@ -54,7 +54,9 @@ DFHack Future
         help: now recognizes built-in commands, like "help"
         manipulator: fixed crash when selecting custom professions when none are found
         remotefortressreader: fixed crash when attempting to send map info when no map was loaded
-        search: fixed crash in unit list after cancelling a job
+        search:
+          - fixed crash in unit list after cancelling a job
+          - fixed crash when disabling stockpile category after searching in a subcategory
         stockpiles: now checks/sanitizes filenames when saving
         stocks: fixed a crash when right-clicking
         steam-engine:

plugins/search.cpp

@@ -1262,7 +1262,17 @@ public:
         return &viewscreen->item_status;
     }
 
+    bool should_check_input(set<df::interface_key> *input)
+    {
+        if (input->count(interface_key::STOCKPILE_SETTINGS_DISABLE) && !in_entry_mode() && !search_string.empty())
+        {
+            // Restore original list
+            clear_search();
+            reset_all();
+        }
 
+        return true;
+    }
 
 };