lint: exit with an error code if any errors are found

fdroidserver/lint.py

@@ -22,6 +22,7 @@ import re
 import logging
 import common
 import metadata
+import sys
 from collections import Counter
 from sets import Set
 
@@ -232,5 +233,7 @@ def main():
     logging.info("Found a total of %i warnings in %i apps out of %i total." % (
         count['warn'], count['app'], count['app_total']))
 
+    sys.exit(1 if count['warn'] > 0 else 0)
+
 if __name__ == "__main__":
     main()