Fix NPE in bugtraq processor
diff --git a/src/main/java/com/gitblit/wicket/pages/DocPage.java b/src/main/java/com/gitblit/wicket/pages/DocPage.java
index 875765f..bf99978 100644
--- a/src/main/java/com/gitblit/wicket/pages/DocPage.java
+++ b/src/main/java/com/gitblit/wicket/pages/DocPage.java
@@ -67,6 +67,10 @@
 			}

 		}

 

+		if (markupText == null) {

+			markupText = "";

+		}

+

 		BugtraqProcessor bugtraq = new BugtraqProcessor(app().settings());

 		markupText = bugtraq.processText(getRepository(), repositoryName, markupText);