re PR c++/8748 (ICE in cp_expr_size at cp/cp-lang.c: 307)

        PR c++/8748
        * class.c (build_base_path): Take the address before calling save_expr.

From-SVN: r61250

gcc/testsuite/g++.dg/init/save1.C

+// PR c++/8748
+// We were wrapping the ARRAY_REF in a SAVE_EXPR, causing us to try to make a bitwise
+// copy of b[0].
+
+struct A
+{
+    int i;
+};
+
+struct B : A
+{
+    virtual ~B();
+};
+
+struct C
+{
+    B b[1];
+};
+
+void foo() { C().b[0].i; }