fix bug in vm_stack
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138f9978f8
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@ -235,11 +235,11 @@ u6a_vm_stack_xch(struct u6a_vm_var_fn v0) {
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return (struct u6a_vm_var_fn) { 0 };
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}
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if (--prev->refcnt > 0) {
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prev = vm_stack_dup(active_stack);
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}
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if (UNLIKELY(active_stack == NULL)) {
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prev = vm_stack_dup(prev);
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if (UNLIKELY(prev == NULL)) {
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return (struct u6a_vm_var_fn) { 0 };
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}
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}
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if (vs->top == 0) {
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++prev->refcnt;
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vs->prev = prev;
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