Fixing array_map function uses

main/coursecopy/classes/CourseBuilder.class.php

@@ -710,7 +710,7 @@ class CourseBuilder {
         }    
         
         if (!empty($id_list)) {
-            array_map('intval', $id_list);
+            $id_list = array_map('intval', $id_list);
             $sql .=" AND id IN (".implode(', ', $id_list).") ";
         }
         

main/dropbox/dropbox_functions.inc.php

@@ -1057,7 +1057,7 @@ function zip_download($array) {
 	// place to temporarily stash the zipfiles
 	$temp_zip_dir = api_get_path(SYS_COURSE_PATH);
 
-	array_map('intval', $array);
+	$array = array_map('intval', $array);
 
 	// note: we also have to add the check if the user has received or sent this file.
 	$sql = "SELECT DISTINCT file.filename, file.title, file.author, file.description

main/exercice/exercise.class.php

@@ -1569,7 +1569,7 @@ class Exercise {
 			$sql_fields = "";
 			$sql_fields_values = "";
 		}
-		array_map('intval', $questionList);
+		$questionList = array_map('intval', $questionList);
 		
 		$weight = Database::escape_string($weight);
         $sql = "INSERT INTO $track_exercises ($sql_fields exe_exo_id, exe_user_id, exe_cours_id, status,session_id, data_tracking, start_date, orig_lp_id, orig_lp_item_id, exe_weighting)