The last argument of rb_rescue2() should always be (VALUE)0

* Otherwise it might segfault, since C has no idea of the type of varargs,
  and the C code must assume all varargs are VALUE.

eval.c

@@ -974,7 +974,7 @@ rb_rescue2(VALUE (* b_proc) (VALUE), VALUE data1,
 
 /*!
  * \copydoc rb_rescue2
- * \param[in] args exception classes, terminated by 0.
+ * \param[in] args exception classes, terminated by (VALUE)0.
  */
 VALUE
 rb_vrescue2(VALUE (* b_proc) (VALUE), VALUE data1,

ext/-test-/cxxanyargs/cxxanyargs.cpp

@@ -181,13 +181,13 @@ namespace test_rb_rescue2 {
     test(VALUE self)
     {
 #ifdef HAVE_NULLPTR
-        rb_rescue2(RUBY_METHOD_FUNC(begin), self, nullptr, self, rb_eStandardError, rb_eFatal, 0);
-        rb_rescue2(begin, self, nullptr, self, rb_eStandardError, rb_eFatal, 0);
+        rb_rescue2(RUBY_METHOD_FUNC(begin), self, nullptr, self, rb_eStandardError, rb_eFatal, (VALUE)0);
+        rb_rescue2(begin, self, nullptr, self, rb_eStandardError, rb_eFatal, (VALUE)0);
 #endif
 
         rb_rescue2(RUBY_METHOD_FUNC(begin), self, RUBY_METHOD_FUNC(rescue), self,
-                   rb_eStandardError, rb_eFatal, 0); // old
-        return rb_rescue2(begin, self, rescue, self, rb_eStandardError, rb_eFatal, 0); // new
+                   rb_eStandardError, rb_eFatal, (VALUE)0); // old
+        return rb_rescue2(begin, self, rescue, self, rb_eStandardError, rb_eFatal, (VALUE)0); // new
     }
 }