Skip the explicit return

Thanks to kernelsmith for the feedback

Author: jvoisin

modules/exploits/linux/local/chkrootkit.rb

@@ -53,8 +53,11 @@ def initialize(info={})
 
   def check
     res = cmd_exec('/usr/sbin/chkrootkit -V')
-    return Exploit::CheckCode::Appears if res && res =~ /chkrootkit version 0\.[^5]/
-    return Exploit::CheckCode::Safe
+    if res && res =~ /chkrootkit version 0\.[^5]/
+        Exploit::CheckCode::Appears
+    else
+        Exploit::CheckCode::Safe
+    end
   end
 
   def exploit