Fix decay()
Fix decay()

decay() generate a pointer from the name of a function or an array,
or in terms of types, a pointer to the type of the node of the
expression.

8l/scc,k0gaMSX/scc,8l/scc,k0gaMSX/kcc,8l/scc,k0gaMSX/kcc,k0gaMSX/scc,k0gaMSX/scc