Fix header file breakage for s2n.h with C++ compilers.
@@ -80,7 +80,7 @@ extern const char *s2n_strerror_name(int error);
struct s2n_stacktrace;
-extern bool s2n_stack_traces_enabled();
+extern bool s2n_stack_traces_enabled(void);
extern int s2n_stack_traces_enabled_set(bool newval);
extern int s2n_calculate_stacktrace(void);
extern int s2n_print_stacktrace(FILE *fptr);
