Fix warnings regarding trailing characters in #ifndef (for GCC).
Fix warnings regarding trailing characters in #ifndef (for GCC).

ferventcoder/ffi,tduehr/ffi,mvz/ffi,MikaelSmith/ffi,ffi/ffi,majioa/ffi,sparkchaser/ffi,yghannam/ffi,mvz/ffi,sparkchaser/ffi,tduehr/ffi,ferventcoder/ffi,ffi/ffi,tduehr/ffi,majioa/ffi,MikaelSmith/ffi,sparkchaser/ffi,mvz/ffi,ferventcoder/ffi,yghannam/ffi,ferventcoder/ffi,yghannam/ffi,MikaelSmith/ffi,tduehr/ffi,MikaelSmith/ffi,yghannam/ffi,majioa/ffi,yghannam/ffi,ffi/ffi,majioa/ffi,mvz/ffi,sparkchaser/ffi