test cases/vala: Fix clang error during int to pointer coercion
```
clang [...] -c valaprog.p/GLib.Thread.c
../test cases/vala/5 target glib/GLib.Thread.vala:17:17: error: incompatible integer to pointer conversion passing 'gint' (aka 'int') to parameter of type 'gpointer' (aka 'void *') [-Wint-conversion]
g_thread_exit (get_ret_code ());
^~~~~~~~~~~~~~~
/usr/include/glib-2.0/glib/gthread.h:158:66: note: passing argument to parameter 'retval' here
void g_thread_exit (gpointer retval);
^
1 error generated.
```
diff --git a/test cases/vala/5 target glib/GLib.Thread.vala b/test cases/vala/5 target glib/GLib.Thread.vala
index 7018821..fc82919 100644
--- a/test cases/vala/5 target glib/GLib.Thread.vala
+++ b/test cases/vala/5 target glib/GLib.Thread.vala
@@ -1,4 +1,4 @@
-extern int get_ret_code ();
+extern void * get_ret_code ();
public class MyThread : Object {
public int x_times { get; private set; }
diff --git a/test cases/vala/5 target glib/retcode.c b/test cases/vala/5 target glib/retcode.c
index abca9bf..df44de5 100644
--- a/test cases/vala/5 target glib/retcode.c
+++ b/test cases/vala/5 target glib/retcode.c
@@ -1,5 +1,5 @@
-int
+void *
get_ret_code (void)
{
- return 42;
+ return (void *) (int) 42;
}
