Anyone ever have a header all the sudden produce an error when you attempt to compile even though you never touched it? I swear, this program was compiling 40 minutes ago.

Conio.h is giving me this compile error:

Code:
92 C:\Dev-Cpp\include\conio.h [Warning] `__cdecl__' attribute only applies to function types
Anyone happen to know what it means and how to fix it?