Apparently I forgot to check the IAT code when I switched to building
wiht -Wextra, since no one should use it.

Just potentially uninitialized warnings in the 3rd party command line
option parsing code, probably spurious and should be ignored but,
initialize them for now.

With all current uses of Ctr, the conditional I was missing is never
triggered since the paramenters are guaranteed to be sane, but this is
not guaranteed to be true in the future.

scan-build also points out a bunch of things in easylogging++ and gtest
but they don't look to be real problems.

A minor matter of ifdefing out code that read device properties that
obfsclient will NEVER call for obvious reasons.

Everything it pointed out was harmless, but being extra pedantic does
not hurt.  -Wno-missing-field-initializers is also added to the
compiler flags because zero initializing a std::array with empty braces
should not be a compiler warning.