Empty structs are not portable C.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@4199 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/newobject2.i

@@ -15,7 +15,9 @@ int g_fooCount = 0;
 
 %inline %{
 /* Struct definition */
-typedef struct {} Foo;
+typedef struct {
+  int dummy;
+} Foo;
 
 /* Make one */
 Foo *makeFoo() {

Examples/test-suite/overload_extendc.i

@@ -2,6 +2,7 @@
 
 %inline %{
 typedef struct Foo {
+  int dummy;
 } Foo;
 %}