add test for 'void *' argument

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8704 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/voidtest.i

@@ -12,5 +12,12 @@ public:
    static void staticmemberfunc(void) { }
 };
 
+
+void *vfunc1(void *f) { return f; }
+void *vfunc2(Foo *f) { return f; }
+Foo  *vfunc3(void *f) { return (Foo *) f; }
+Foo  *vfunc4(Foo *f) { return f; }
+ 
+
 %}