vm: fixed memrealloc opc when input pointer is null
vm: fixed memrealloc opc when input pointer is null

nany-lang/nany,nany-lang/nanyc,milipili/nany,nany-lang/nany,nany-lang/nany,milipili/nany,milipili/nany,nany-lang/nanyc,nany-lang/nanyc