Readd dropped return during refactoring

Author: wvu

modules/exploits/unix/local/setuid_nmap.rb

@@ -53,7 +53,7 @@ def initialize(info={})
   def check
     if setuid?(datastore['Nmap'])
       vprint_good("#{datastore['Nmap']} is setuid")
-      CheckCode::Vulnerable
+      return CheckCode::Vulnerable
     end
     CheckCode::Safe
   end