[svn r12] fixed accessing aggregate fields of aggregates

removed some useless branches for successive scopes ala {}{}{}

test/classes5.d

@@ -13,5 +13,11 @@ class C
 
 void main()
 {
-    //C c = new C;
+    C c = new C;
+    long* lp = void;
+    {c.s.l = 64;}
+    {assert(c.s.l == 64);}
+    {lp = &c.s.l;}
+    {assert(*lp == 64);}
+    printf("classes5 success\n");
 }

test/scope1.d

@@ -0,0 +1,10 @@
+module scope1;
+
+void main()
+{
+    printf("1\n");
+    {
+        scope(exit) printf("2\n");
+    }
+    printf("3\n");
+}

test/structs3.d

@@ -2,8 +2,8 @@ module structs3;
 
 struct S
 {
-    float l;
     char c;
+    float f;
 }
 
 struct T
@@ -14,4 +14,17 @@ struct T
 
 void main()
 {
+    T t;
+    float f = void;
+    float* fp = void;
+    {f = t.s.f;}
+    {t.s.f = 0.0;}
+    {fp = &t.s.f;}
+    {*fp = 1.0;}
+    {assert(t.s.f == 1.0);}
+    {assert(*(&t.s.f) == 1.0);}
+    {t.s.c = 'a';}
+    {assert(t.s.c == 'a');}
+    {t.l = 64;}
+    {assert(t.l == 64);}
 }