Fixed Issue #3950 Default missing Default ? in php version

Till Brehm

2016-06-14 855cf2aaeb5e4cd43f4f0e6f79a66e0ab6fbebcf

 interface/web/dns/form/dns_ptr.tform.php

@@ -140,7 +140,7 @@
               'range' => '60:',
               'errmsg'=> 'ttl_range_error'),
         ),
         'default' => '86400',
         'default' => '3600',
         'value'  => '',
         'width'  => '10',
         'maxlength' => '10'