temporary restriction of unit test to 64-bit

Author: czurnieden

demo/test.c

@@ -583,7 +583,11 @@ static int test_mp_printf_extension(void)
 
    DO(mp_printf_extension_init());
 
+#if (MP_DIGIT_BIT == 60)
    for (idx = 0; idx < 106; idx++) {
+#else
+   for (idx = 0; idx < 58; idx++) {
+#endif
       if (idx == 18) {
          mp_exch(&p,&q);
       }