add some missing stuff

XD.c

@@ -78,9 +78,8 @@ has_stashes(git_repository *repo)
 
   e = git_reference_lookup(&stash, repo, "refs/stash");
   if (e == GIT_ENOTFOUND) {
-    git_error_clear();
     return 0;
-  } else if (e < GIT_OK) {
+  } else if (e < 0) {
     L("Error looking up stash reference: %s", git_error_last()->message);
     return 0;
   } else {
@@ -122,6 +121,12 @@ has_untracked(git_repository *repo)
   return r;
 }
 
+/**
+ * @brief check for staged changes
+ *
+ * @param repo git repository object
+ * @return 1 if any staged changes found 0 otherwise
+ */
 int
 has_staged(git_repository *repo)
 {