More Win32 build compliance fixups
diff --git a/progs/samples/overlay.c b/progs/samples/overlay.c
index 0def2b1..4542b49 100644
--- a/progs/samples/overlay.c
+++ b/progs/samples/overlay.c
@@ -347,7 +347,7 @@
     if (!glutLayerGet(GLUT_OVERLAY_POSSIBLE))
     {
 	fprintf(stderr, "Overlay not available\n");
-	return;
+	return(1);
     }
 
     if (Args(argc, argv) == GL_FALSE) {