stage1 指针计算类型的错误修复 as运算符优先级的修改 ir2vm的bug修复

stage0/spl_mcode.h

@@ -170,7 +170,9 @@ typedef struct spl_vm_func {
 typedef VEC(spl_vm_func_t) spl_vm_func_vec_t;
 
 /* Native function pointer type */
-typedef spl_vm_val_t (*spl_vm_fn_t)(int nargs, spl_vm_val_t *args);
+struct spl_vm;
+typedef struct spl_vm spl_vm_t;
+typedef spl_vm_val_t (*spl_vm_fn_t)(spl_vm_t *vm, int nargs, spl_vm_val_t *args);
 typedef struct spl_vm_native {
     char *name;
     spl_vm_val_t idx_of_strtab;