patch 8.2.4278: build with Athena GUI fails

Problem:    Build with Athena GUI fails. (Elimar Riesebieter)
Solution:   Add #ifdef.
diff --git a/src/version.c b/src/version.c
index 0dc936a..9550478 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4278,
+/**/
     4277,
 /**/
     4276,