Only show general help message if no other arguments are given

NeoTheThird · NeoTheThird · commit e404b153e19a · 2018-07-23T11:42:38.000+02:00
diff --git a/ubports-qa b/ubports-qa
@@ -125,4 +125,6 @@ try:
     args = parser.parse_args()
     args.func(args)
 except:
-    parser.print_help()
+    try: args
+    except: pass
+    else: parser.print_help()
