Avoid AttributeError when self.result_code was not set, such as when running with dry_run. Fixes #38.

1 files changed, 1 insertions, 2 deletions

diff --git a/ptr.py b/ptr.py
index 56a5c00..3de0129 100644
--- a/ptr.py
+++ b/ptr.py
@@ -192,9 +192,8 @@ class PyTest(orig.test):
 		don't install them anywhere).
 		"""
 		self._super_run()
-		if self.result_code:
+		if getattr(self, 'result_code', None):
 			raise SystemExit(self.result_code)
-		return self.result_code
 
 	@property
 	def _argv(self):