Function decl_initializer_alloc

parse an initializer for type 't' if 'has_init' is non zero, and allocate space in local or global data space ('r' is either VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated variable 'v' of scope 'scope' is declared before initializers are parsed. If 'v' is zero, then a reference to the new object is put in the value stack. If 'has_init' is 2, a special parsing is do