Prevent division by zero.

Closes #55.

NEWS.md

@@ -13,7 +13,9 @@ For changes prior to version 6.0.0, please see [`NEWS.old`](news.old).
 
 - Fixed a regression concerning `linktitles-cli` progress display that was
   introduced in v8.0.0.
-  
+- Prevent a division-by-zero error that could occur on the LinkTitles special
+  page.
+
 ## [8.0.0][] - 2021-04-06
 
 ### Changed

includes/Special.php

@@ -247,7 +247,14 @@ EOF
 	 * @return undefined
 	 */
 	private function addCompletedInfo( &$output, $start, $end, $reloads ) {
-		$pagesPerReload = sprintf('%0.1f', $end / $reloads);
+		if ( $reloads > 0 ) {
+			$pagesPerReload = sprintf( '%0.1f', $end / $reloads );
+		}
+		else
+		{
+			$pagesPerReload = sprintf( '%0.1f', $end );
+		}
+		
 		$output->addWikiMsg( 'linktitltes-special-completed-info', $end,
 			$config->specialPageReloadAfter, $reloads, $pagesPerReload
 		);