fix proper escaping of label titles (closes #255)

modules/backend-rpc.php

@@ -450,7 +450,8 @@
 			$ids = split(",", db_escape_string($_REQUEST["ids"]));
 			$label_id = db_escape_string($_REQUEST["lid"]);
 
-			$label = label_find_caption($link, $label_id, $_SESSION["uid"]);
+			$label = db_escape_string(label_find_caption($link, $label_id, 
+				$_SESSION["uid"]));
 
 			print "<rpc-reply>";
 			print "<info-for-headlines>";
@@ -485,7 +486,8 @@
 			$ids = split(",", db_escape_string($_REQUEST["ids"]));
 			$label_id = db_escape_string($_REQUEST["lid"]);
 
-			$label = label_find_caption($link, $label_id, $_SESSION["uid"]);
+			$label = db_escape_string(label_find_caption($link, $label_id, 
+				$_SESSION["uid"]));
 
 			print "<rpc-reply>";			
 

modules/pref-labels.php

@@ -61,6 +61,8 @@
 
 						/* Update filters that reference label being renamed */
 
+						$old_caption = db_escape_string($old_caption);
+
 						db_query($link, "UPDATE ttrss_filters SET
 							action_param = '$caption' WHERE action_param = '$old_caption'
 							AND action_id = 7