smarty notice - confirm_message is usually irrelevant in report listings

[demeritcowboy]

Overview

Under Reports, visit any of the links, e.g. Contact Reports.

Before

Notice: Undefined index: confirm_message in include() (line 11 of ...\templates_c\en_US\%%93\93C\93C94F9B%%InstanceList.tpl.php).

After

Technical Details

confirm_message is usually only relevant for delete actions or some custom actions

Comments

Technically '0' is a valid string even if not a good message. I waffled a bit over whether to use isset, but which would then include the empty string.

[civibot]

(Standard links)

• If this is your first pull-request for CiviCRM, please browse CONTRIBUTING.md for information about the development and testing processes.
• If you are reviewing this pull-request, you may wish to consult the test sites and the Review Standards (long template, short template).

[colemanw]

Looks good.

[demeritcowboy]

Thanks @colemanw

[monishdeb]

Merging as per tag