Make log_ident_revert_to_default() a proper prototype.
Pointed out by clang with -Wstrict-prototypes.
@@ -121,7 +121,7 @@ void log_ident_set_default(const char* id);
/**
* Revert identity to print, back to the recorded default value.
*/
-void log_ident_revert_to_default();
+void log_ident_revert_to_default(void);
/**
* Set identity to print if there is an identity, otherwise
