[PATCH] Fix PR c++/69098 (bogus errors with static data member template)

[Jason Merrill]

On 02/10/2016 02:16 PM, Patrick Palka wrote:
> ...in tsubst_qualified_id() I just copied the way variable templates are
> handled in tsubst_copy_and_build [TEMPLATE_ID_EXPR].

Let's factor that code out into another function rather than copy it.

Jason