Fix bug in uninitialized variable am: 7ad4cd6486 am: 8e13080b75

Original change: https://android-review.googlesource.com/c/platform/tools/external_updater/+/2980254

Change-Id: I35352e4cc5a202045ac7af4353895b19359f7fe9
Signed-off-by: Automerger Merge Worker <[email protected]>
diff --git a/external_updater.py b/external_updater.py
index 4c9f070..bca56bc 100644
--- a/external_updater.py
+++ b/external_updater.py
@@ -257,6 +257,7 @@
                 print('Refreshing the current version')
                 updater.refresh_without_upgrading()
 
+            answer = False
             if alternative_version is not None:
                 answer = use_alternative_version(updater)
                 if answer: