PVS-Studio warning V595 for Wine

static var_t *declare_var(....)
{
  ....
  var_t *v = decl->var;                                 //<==
  expr_list_t *sizes = get_attrp(attrs, ATTR_SIZEIS);
  expr_list_t *lengs = get_attrp(attrs, ATTR_LENGTHIS);
  int sizeless;
  expr_t *dim;
  type_t **ptype;
  array_dims_t *arr = decl ? decl->array : NULL;        //<==
  type_t *func_type = decl ? decl->func_type : NULL;    //<==
  ....
}

This suspicious code was found in Wine project by PVS-Studio static code analyzer.
Warning message is:
V595 The 'decl' pointer was utilized before it was verified against nullptr. Check lines: 1411, 1417. parser.y 1411

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/