c-common.c line 5179: isn't this a nop?

[Matt Thomas]

In handle_aligned_attributes in c-common.c, at line 5146, it does        type = &TREE_TYPE (decl);

Then at 5179 it does

        TREE_TYPE (decl) = *type;

In between, type doesn't change so that's really

        TREE_TYPE (decl) = * &TREE_TYPE (decl);
or
        TREE_TYPE (decl) = TREE_TYPE (decl);

now that seems redundant to me.  Maybe it was supposed to be  
something else.
I noticed this while trying to figure out why the following has an  
error on line 5:
typedef unsigned long ul_t __attribute__((__aligned__(16)));
typedef volatile unsigned long vul_t __attribute__((__aligned__(16)));

int ul[__alignof(ul_t) == 16 ? 1 : -1];
int vul[__alignof(vul_t) == 16 ? 1 : -1];