circle.rb in danger-2.1.4

- old
+ new

@@ -27,10 +27,10 @@
       env.key? "CIRCLE_BUILD_NUM"
     end
 
     def self.validates_as_pr?(env)
       # This will get used if it's available, instead of the API faffing.
-      return true if env["CI_PULL_REQUEST"]
+      return true unless env["CI_PULL_REQUEST"].empty?
 
       # Real-world talk, it should be worrying if none of these are in the environment
       return false unless ["CIRCLE_CI_API_TOKEN", "CIRCLE_PROJECT_USERNAME", "CIRCLE_PROJECT_REPONAME", "CIRCLE_BUILD_NUM"].all? { |x| env[x] }
 
       # Uses the Circle API to determine if it's a PR otherwose