Pass InCheck as template parameter of qsearch()

Pass InCheck as template parameter of qsearch()

Instead of use a variable so to resolve many conditions
already at compile time. In quiesce is also where we
have most of the InCheck nodes and is one of the most
performance critical code paths.

Speed up of 1.5% with Clang and 1% with gcc

Suggested by Hongzhi Cheng.

No functional change.