beefed up varargs test

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@4577 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/varargs.i

@@ -9,9 +9,20 @@ char *test(const char *fmt, ...) {
 
 class Foo {
 public:
-	char *test(const char *fmt, ...) {
-             return (char *) fmt;
-        }
+    char *str;
+    Foo() {
+        str = NULL;
+    }
+    Foo(const char *fmt, ...) {
+        str = new char[strlen(fmt) + 1];
+        strcpy(str, fmt);
+    }
+    ~Foo() {
+        delete [] str;
+    }
+    char *test(const char *fmt, ...) {
+        return (char *) fmt;
+    }
 };
 
 %}