fix all other cases of sys.exit() overflow

fdroidserver/lint.py

@@ -2454,13 +2454,13 @@ def main():
                 failed += 1
         # an empty list of appids means check all apps, avoid that if files were given
         if not options.appid:
-            sys.exit(failed)
+            sys.exit(failed != 0)
 
     if not lint_metadata(options):
         failed += 1
 
     if failed:
-        sys.exit(failed)
+        sys.exit(1)
 
 
 def lint_metadata(options):

fdroidserver/update.py

@@ -3021,7 +3021,7 @@ def main():
                 )
             )
     if errors:
-        sys.exit(errors)
+        sys.exit(1)
 
     # Scan the archive repo for apks as well
     if len(repodirs) > 1:

fdroidserver/verify.py

@@ -306,7 +306,7 @@ def main():
         logging.info("{0} successfully verified".format(verified))
     if notverified > 0:
         logging.info("{0} NOT verified".format(notverified))
-    sys.exit(notverified)
+    sys.exit(notverified != 0)
 
 
 if __name__ == "__main__":