Added checks to cross-domain-policy-audit.js to avoid NPE due to resp…

…onseChecks being called before there are responses to process.

scripts/scanner/modules/injection/cross-domain-policy-audit.js

@@ -11,7 +11,17 @@ function initialize(ctx) {
 }
 
 function process(req, res, ctx) {
-  ctx.responseChecks(req, res);
+	if (ctx.hasModuleFailed()) return;
+
+  if (res.fetchFail) {
+    ctx.error(req, res, "During cross-domain policy auditor checks");
+    ctx.setModuleFailed();
+    return;
+  }
+
+  if (ctx.allResponsesReceived()) {
+    ctx.responseChecks(req, res);
+  }
 }