[svn r15] * Fixed a bunch problems with virtual calls. Seems I did some rather poor testing.

* Now 50/51 tests compile.
* Added a simple runalltests.d scripts that should be run with 'gdmd -run runalltests.d' - LLVMDC will not compile it yet.

test/classes6.d

@@ -4,12 +4,34 @@ class C
 {
     void f()
     {
-        printf("hello world\n");
+        printf("world\n");
     }
 }
 
+class D : C
+{
+    void f()
+    {
+        printf("moon\n");
+    }
+}
+
+
+extern(C)
+{
+    void srand(uint seed);
+    int rand();
+}
+
+import llvm.intrinsic;
+
 void main()
 {
-    scope c = new C;
+    C c;
+    srand(readcyclecounter());
+    if (rand() % 2)
+        c = new C;
+    else
+        c = new D;
     c.f();
 }

test/classes7.d

@@ -0,0 +1,21 @@
+module classes7;
+
+class C
+{
+    int i=0;
+    void f()
+    {
+        i=42;
+    }
+    void g()
+    {
+        f();
+    }
+}
+
+void main()
+{
+    scope c = new C;
+    c.g();
+    assert(c.i == 43);
+}