Fix directorin SWIGTYPE typemaps to make a copy as these are used for pass by value.

Closes #434

Examples/test-suite/java/director_pass_by_value_runme.java

@@ -0,0 +1,48 @@
+
+import director_pass_by_value.*;
+
+public class director_pass_by_value_runme {
+
+  static {
+    try {
+      System.loadLibrary("director_pass_by_value");
+    } catch (UnsatisfiedLinkError e) {
+      System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e);
+      System.exit(1);
+    }
+  }
+
+  private static void WaitForGC() {
+    System.gc();
+    System.runFinalization();
+    try {
+      java.lang.Thread.sleep(10);
+    } catch (java.lang.InterruptedException e) {
+    }
+  }
+
+  public static void main(String argv[]) {
+    Caller caller = new Caller();
+    caller.call_virtualMethod(new director_pass_by_value_Derived());
+    {
+      int countdown = 5;
+      while (true) {
+        WaitForGC();
+        if (--countdown == 0)
+          break;
+      };
+    }
+    // bug was the passByVal 'global' object was destroyed after the call to virtualMethod had finished.
+    int ret = director_pass_by_value_runme.passByVal.getVal();
+    if (ret != 0x12345678)
+      throw new RuntimeException("Bad return value, got " + Integer.toHexString(ret));
+  }
+
+  static PassedByValue passByVal;
+}
+
+class director_pass_by_value_Derived extends DirectorPassByValueAbstractBase {
+  public void virtualMethod(PassedByValue pbv) {
+    director_pass_by_value_runme.passByVal = pbv;
+  }
+}