patch 8.1.1287: cannot build with +eval but without +mouse

Problem:    Cannot build with +eval but without +mouse.
Solution:   Add #ifdefs around f_test_setmouse(). (John Marriott)
diff --git a/src/version.c b/src/version.c
index 098c723..e2ca5b0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1287,
+/**/
     1286,
 /**/
     1285,