defined(@array) is deprecated in perl 5.16

[aubreyja]

This is not as big a deal as with pg since the warning messages are not displayed to the student, but at startup and in the error log are these warning messages:

defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/Assigner.pm line 109.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/Assigner.pm line 111.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/Index.pm line 318.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/Index.pm line 320.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/SendMail.pm line 115.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/SendMail.pm line 117.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/StudentProgress.pm line 197.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/StudentProgress.pm line 199.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/StudentProgress.pm line 371.
(Maybe you should just omit the defined()?)
defined(@array) is deprecated at /Users/jason/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/StudentProgress.pm line 373.
(Maybe you should just omit the defined()?)