Bug 319654 - Processing instructions in XUL are not added to the content model, modifying test10, to make it more correct

layout/reftests/xul-document-load/test010.css

@@ -1,3 +1,3 @@
 window { 
-  background-color: red;
+  background-color: red !important;
 }

layout/reftests/xul-document-load/test010.xul

@@ -19,7 +19,7 @@
     assert(winEl.childNodes[1].nodeName == "xul-overlay", "xul-overlay PI is in the correct place");
   } catch(e) {
     dump(e);
-    assert(false);
+    assert(false, e);
     throw e;
   }
   </script>