Silence gcc initializer warning.
MODIFY
src/vm.c
src/vm.c
@@ -101,7 +101,7 @@ static inline void
stack_clear(mrb_value *from, size_t count)
{
#ifndef MRB_NAN_BOXING
- const mrb_value mrb_value_zero = { { 0 } };
+ const mrb_value mrb_value_zero = { 0 };
while (count-- > 0) {
*from++ = mrb_value_zero;

Silence gcc initializer warning.