Fix crash when tuxtest fails (result=error)
File "tuxsuite/cli.py", line 348, in test
test_result = wait_for_object(test)
File "tuxsuite/cli.py", line 39, in wait_for_object
for state in build_object.watch():
File "tuxsuite/build.py", line 496, in watch
errors=errors,
UnboundLocalError: local variable 'errors' referenced before assignment