fix sqlite3 cannot create repo

conf/app.ini

@@ -15,8 +15,8 @@ SCRIPT_TYPE = bash
 ANSI_CHARSET = 
 ; Force every new repository to be private
 FORCE_PRIVATE = false
-; Global maximum creation limit of repository per user, 0 means no limit
-MAX_CREATION_LIMIT = 0
+; Global maximum creation limit of repository per user, -1 means no limit
+MAX_CREATION_LIMIT = -1
 ; Patch test queue length, make it as large as possible
 PULL_REQUEST_QUEUE_LENGTH = 10000