The expert_item pointers and expert_status values don't need to be

The expert_item pointers and expert_status values don't need to be
static; make them auto variables.

Make sure that expert information is added outside "if (tree) { }", so
it gets added even if we're not building the protocol tree.

Clean up white space.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@28281 f5534014-38df-0310-8fa8-9805f1628bb7