patch 8.0.1401: cannot build with GTK but without XIM

Problem:    Cannot build with GTK but without XIM. (Guido)
Solution:   Adjust #ifdef. (closes #2461)
diff --git a/src/version.c b/src/version.c
index 2da64a2..ba65a54 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1401,
+/**/
     1400,
 /**/
     1399,