Add crashtest

layout/base/crashtests/340093-1.xul

@@ -0,0 +1,11 @@
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml">
+
+        <html:style>
+            menulist, menulist * { 
+                overflow: scroll; 
+            }
+        </html:style>
+        
+        <menulist/>
+
+</window>

layout/base/crashtests/crashtests.list

@@ -25,6 +25,7 @@ load 337419-1.html
 load 337476-1.xul
 load 338703-1.html
 load 339651-1.html
+load 340093-1.xul
 load 343540-1.html
 load 344340-1.xul
 load 348688-1.html