patch 8.0.1278: GUI window always resizes when adding scrollbar

Problem:    GUI window always resizes when adding/removing a scrollbar,
            toolbar, etc.
Solution:   Add the 'k' flag in 'guioptions' to keep the GUI window size and
            change the number of lines/columns instead. (Ychin, closes #703)
diff --git a/src/version.c b/src/version.c
index b5e4539..bba2938 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1278,
+/**/
     1277,
 /**/
     1276,