fix(query): prevent undefined error

Author: farnabaz

src/runtime/query/query.ts

@@ -35,6 +35,10 @@ export function createQuery <T = ParsedContent> (fetcher: ContentQueryFetcher<T>
         return result.surround
       }
 
+      if (!result) {
+        return result
+      }
+
       if ((result as any)?.dirConfig) {
         result.result = {
           _path: (result as any).dirConfig?._path,