Fix the mutex diagnostics, and other targets of opportunity.

Three changes for the price of one:

1. Fix the mutex diagnostics so they work right during startup and shutdown.

2. Fix a memory leak in common_test.

3. Fix memory corruption in the compiler; we were calling memset(3) on a struct
with non-POD members.

Thanks, as usual, to valgrind(1) for the latter two (and several bugs in
earlier attempts at the former).

Change-Id: I15e1ffb01e73e4c56a5bbdcaa7233a4b5221e08a

0 files changed, 0 insertions, 0 deletions