change to ria_tzset

libsrc/rp6502/ria_tzset.c

@@ -0,0 +1,9 @@
+#include <rp6502.h>
+#include <time.h>
+
+int clock_gettimezone (time_t time, clockid_t clock_id, struct _timezone* tz);
+
+void ria_tzset (unsigned long time)
+{
+    clock_gettimezone (time, CLOCK_REALTIME, &_tz);
+}