Fix wrapping of virtual comparison operators with directors

Closes #1642.

Examples/test-suite/common.mk

@@ -184,6 +184,7 @@ CPP_TEST_CASES += \
 	director_classes \
 	director_classic \
 	director_constructor \
+	director_comparison_operators \
 	director_conversion_operators \
 	director_default \
 	director_detect \

Examples/test-suite/director_comparison_operators.i

@@ -0,0 +1,16 @@
+%module(directors="1") director_comparison_operators
+
+%include "std_string.i"
+%feature("director");
+
+%inline %{
+class Foo {
+public:
+  virtual ~Foo() { }
+  virtual bool operator==(const Foo&) const = 0;
+  virtual bool operator>=(const Foo&) const = 0;
+  virtual bool operator<=(const Foo&) const = 0;
+  virtual bool operator!=(const Foo&) const = 0;
+  virtual std::string test(const char *foo="a=1,b=2") { return foo; }
+};
+%}

Examples/test-suite/python/director_comparison_operators_runme.py

@@ -0,0 +1,11 @@
+import director_comparison_operators
+
+
+class PyFoo(director_comparison_operators.Foo):
+    pass
+
+
+a = PyFoo()
+
+if a.test() != "a=1,b=2":
+    raise RuntimeError, a.test()