Got rid of useless _PROTO macros

Note that this change is a noop, as the code after compiler preprocessing does not change. This was actually double checked manually.

mediachanger/castorrmc/h/Csnprintf.h

@@ -10,7 +10,7 @@
 #include <sys/types.h>
 #include "osdep.h"
 
-EXTERN_C int Csnprintf _PROTO((char *, size_t, const char *, ...));
-EXTERN_C int Cvsnprintf _PROTO((char *, size_t, const char *, va_list));
+EXTERN_C int Csnprintf (char *, size_t, const char *, ...);
+EXTERN_C int Cvsnprintf (char *, size_t, const char *, va_list);
 
 #endif /* __Csnprintf_h */