Empty commits should have (need) change IDs

Passing the Defalt::default() as the headers option creates a new change id

Author: Caleb-T-Owens

crates/gitbutler-branch-actions/src/virtual.rs

@@ -1469,7 +1469,7 @@ pub(crate) fn insert_blank_commit(
     let commit_tree = repository
         .find_real_tree(&commit, Default::default())
         .unwrap();
-    let blank_commit_oid = ctx.commit("", &commit_tree, &[&commit], None)?;
+    let blank_commit_oid = ctx.commit("", &commit_tree, &[&commit], Some(Default::default()))?;
 
     if commit.id() == stack.head() && offset < 0 {
         // inserting before the first commit