Use proper `PEEK` macro for `OP_EPUSH` in `patch_irep`; fix
@@ -110,8 +110,8 @@ patch_irep(mrb_state *mrb, mrb_irep *irep, int bnest, mrb_irep *top)
insn = iseq[i];
switch(insn){
case OP_EPUSH:
- b = PEEK_S(iseq+i+1);
- patch_irep(mrb, irep->reps[b], bnest + 1, top);
+ a = PEEK_B(iseq+i+1);
+ patch_irep(mrb, irep->reps[a], bnest + 1, top);
break;
case OP_LAMBDA:
