Only inject pointer checks if we run.
Only inject pointer checks if we run.

Fixes an issue visible on Ubuntu, where we deserialize a pointer check call from the PCH, that now has completely bogus (deserialized) pointers to Expr and Sema.

root-mirror/cling,root-mirror/cling,karies/cling,marsupial/cling,root-mirror/cling,root-mirror/cling,karies/cling,marsupial/cling,marsupial/cling,karies/cling,karies/cling,root-mirror/cling,root-mirror/cling,karies/cling,marsupial/cling,marsupial/cling,karies/cling,marsupial/cling