Removed Linux unused function and variable warning
Removed Linux unused function and variable warning

Removed itoahex_s 'defined but unused' warning when compiling wtih
RMT_PLATFORM_LINUX and RMT_USE_POSIX_THREADNAMES.

Removed general 'unused variable' warnings from strcpy_s.

Celtoys/Remotery,Celtoys/Remotery,Celtoys/Remotery