[svn r25] * Fixed a lot of problems with string literals

* Fixed slice-slice copying assignment

test/strings1.d

@@ -0,0 +1,15 @@
+module strings1;
+
+void f(char[11] buffer)
+{
+    printf("%.*s\n", buffer.length, buffer.ptr);
+}
+
+void main()
+{
+    char[11] buffer;
+    char[] hello = "hello world";
+    {buffer[] = hello[];}
+    {f(buffer);}
+    {f("eleven char");}
+}