Exit function after setting confirm submit msg

Bug was probably introduced in https://chromium-review.googlesource.com/c/infra/gerrit-plugins/chumpdetector/+/1111237/

Bug: 932279
Change-Id: I8e6f9ac55fa7e47068e3536fc3b5e54c49090b4f
Reviewed-on: https://chromium-review.googlesource.com/c/infra/gerrit-plugins/chumpdetector/+/1517952
Reviewed-by: Andy Perelson <ajp@chromium.org>
diff --git a/src/main/resources/static/chumpdetector.js b/src/main/resources/static/chumpdetector.js
index 446af46..b9537ad 100644
--- a/src/main/resources/static/chumpdetector.js
+++ b/src/main/resources/static/chumpdetector.js
@@ -537,6 +537,7 @@
         'You should submit your change by clicking "Reply" and setting the ' +
         '"Commit-Queue" label to the appropriate value.\n' +
         'Do you want to commit the change directly, bypassing CQ (dangerous)?');
+    return true;
   }
 
   // Tree is open, do not block the change.