Strange Error message with extern "C" for 2nd set used.

[Jasonzz]

I using some body else code for a project which I'm getting the following error message

" At global scope:

error writing to -: No error

} // extern "c"

This happen for the 2nd set of "extern "C" { being used in hid.cpp

I happen to down load the qt_widows-opensource-5.1.1.-mingw48_opengl-x86-offline.exe file and
ran it today.