fix: return empty value if backend is unrecognized

1 files changed, 4 insertions, 0 deletions

diff --git a/tessen b/tessen
index d8823c3..c5ef7e0 100755
--- a/tessen
+++ b/tessen
@@ -383,6 +383,10 @@ get_default_opts() {
       printf "%s" "-d"
       return 0
       ;;
+    *)
+      printf ""
+      return 1
+      ;;
   esac
 }