Add error checking for db database engine

1 files changed, 2 insertions, 0 deletions

diff --git a/db.lua b/db.lua
index 3236e1a..18af1f3 100644
--- a/db.lua
+++ b/db.lua
@@ -171,6 +171,8 @@ export.listdatabases = function(dbobject)
 				result[#result+1] = table
 			end
 		end
+	else
+		error("Invalid database engine", 0)
 	end
 	return result
 end