[minor] allowed to render the charts if only single record is available

frappe/public/js/frappe/ui/charts.js

@@ -6,8 +6,8 @@ frappe.ui.Chart = Class.extend({
 		$.extend(this.opts, opts);
 		this.show_chart(false);
 
-		if(this.opts.data && ((this.opts.data.columns && this.opts.data.columns.length > 1)
-			|| (this.opts.data.rows && this.opts.data.rows.length > 1))) {
+		if(this.opts.data && ((this.opts.data.columns && this.opts.data.columns.length >= 1)
+			|| (this.opts.data.rows && this.opts.data.rows.length >= 1))) {
 				this.chart = this.render_chart();
 				this.show_chart(true);
 		}