fix(list): ensure the recursive option is set

The recursive variable bound to the query was undefined when both
the tree and the recursive option were not set.
Since these are conflicting, they cannot be assigned a default value.

commands/list.js

@@ -433,15 +433,17 @@ function getListRenderer (options, renderItem, sortItemList) {
  */
 async function ls (db, collection, options) {
   const { glob, long, tree, recursive, depth } = options
-  const result = await db.queries.readAll(query, {
-    variables: {
-      collection,
-      glob,
-      depth,
-      recursive: tree || recursive,
-      'collections-only': options['collections-only']
-    }
-  })
+  const variables = {
+    collection,
+    glob,
+    depth,
+    recursive: Boolean(tree || recursive),
+    'collections-only': options['collections-only']
+  }
+  if (options.debug) {
+    console.log(variables)
+  }
+  const result = await db.queries.readAll(query, { variables })
   const raw = result.pages.toString()
   const json = JSON.parse(raw)
   if (json.error) {