improve reliability of method_missing

lib/resources/auditd_conf.rb

@@ -28,7 +28,7 @@ class AuditDaemonConf < Vulcano.resource(1)
 
   def method_missing(name)
     @params || read_content
-    @params[name.to_s]
+    !@params.nil? ? (return @params[name.to_s]) : (return nil)
   end
 
   def read_content

lib/resources/inetd_conf.rb

@@ -29,7 +29,7 @@ class InetdConf < Vulcano.resource(1)
 
   def method_missing(name)
     @params || read_content
-    @params[name.to_s]
+    !@params.nil? ? (return @params[name.to_s]) : (return nil)
   end
 
   def read_content

lib/resources/limits_conf.rb

@@ -27,7 +27,7 @@ class LimitsConf < Vulcano.resource(1)
 
   def method_missing(name)
     @params || read_content
-    @params[name.to_s]
+    !@params.nil? ? (return @params[name.to_s]) : (return nil)
   end
 
   def read_content

lib/resources/login_def.rb

@@ -33,7 +33,7 @@ class LoginDef < Vulcano.resource(1)
 
   def method_missing(name)
     @params || read_content
-    @params[name.to_s]
+    !@params.nil? ? (return @params[name.to_s]) : (return nil)
   end
 
   def read_content

lib/resources/ntp_conf.rb

@@ -28,6 +28,7 @@ class NtpConf < Vulcano.resource(1)
 
   def method_missing(name)
     @params || read_content
+    return nil if @params.nil?
     param = @params[name.to_s]
     # extract first value if we have only one value in array
     param = param[0] if !param.nil? && param.length == 1

lib/resources/ssh_conf.rb

@@ -31,6 +31,7 @@ class SshConf < Vulcano.resource(1)
   end
 
   def method_missing(name)
+    return nil if @params.nil?
     param = @params[name.to_s]
     # extract first value if we have only one value in array
     param = param[0] if !param.nil? && param.length == 1