Fixed critical vulnerability in Code BBCode tag

Builder/IISMainHandler/build.txt

@@ -1 +1 @@
-574
+575

Builder/IISUploadHandler/build.txt

@@ -1 +1 @@
-308
+309

Common/BBCodes/Code.cs

@@ -12,7 +12,7 @@ namespace FLocal.Common.BBCodes {
 		}
 
 		public override string Format(ITextFormatter formatter) {
-			return "<pre>" + this.InnerBBCode.Trim() + "</pre><br/>";
+			return "<pre>" + System.Web.HttpUtility.HtmlEncode(this.InnerBBCode.Trim()) + "</pre><br/>";
 		}
 
 	}