Don't produce a vtable for a class if we have an explicit template instantiation declaration and no key function. We will produce the vtable at the explicit template instantiation.

Fixes PR6748



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100266 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed