script: fix crash when a /script command triggers another /script command (issue #923)

src/plugins/script/script-action.c

@@ -1300,6 +1300,9 @@ script_action_run_all ()
                                     | WEECHAT_STRING_SPLIT_STRIP_RIGHT
                                     | WEECHAT_STRING_SPLIT_COLLAPSE_SEPS,
                                     0, &num_actions);
+
+    script_action_clear ();
+
     if (actions)
     {
         for (i = 0; i < num_actions; i++)
@@ -1564,8 +1567,6 @@ script_action_run_all ()
         weechat_string_free_split (actions);
     }
 
-    script_action_clear ();
-
     return 1;
 }