fix the code to compile with clang. fix warnings too.
include/probes_mysql_nodtrace.h:
clang++ doesn't like numeric _constants_ being used in ||
(it suspects that the intention was | ). Boolean constants are ok.
sql/hostname.cc:
only used in DBUG_ASSERT
sql/item.cc:
str_to_time and str_to_datetime return bool, not MYSQL_TIMESTAMP_xxx
sql/item_func.cc:
str_to_datetime_with_warn() returns bool, not MYSQL_TIMESTAMP_xxx
storage/cassandra/CMakeLists.txt:
CMAKE_CXX_FLAGS can be empty
storage/connect/odbconn.cpp:
HWND is void*
storage/connect/user_connect.h:
deprecated on FreeBSD and unused anyway
storage/connect/value.cpp:
bad characters inside. unused.
storage/spider/spd_trx.cc:
clang++ warns that memset will also overwrite vtbl. it might be as well a good idea,
as it asserts that the object will only be used as a storage.
silence the warning.
