civicrm/civicrm-core — pull request #1950 by pratik-joshi (2013-11-11 14:26:37+00:00)
Title: Crm 13735

for contribution summary display using bar chart, while receive date grouping (Frequency selection) done by 'Year' : the chart labels are integers, this was causing chart to not appear during 'Year' grouping (Frequency selection) for receive date.

checked the function definition of $xLabels->set_labels($xValues); inside packages/OpenFlashChart/php-ofc-library/ofc_x_axis_labels.php file which states @param $labels as an array of [x_axis_label or string]