patch 8.1.1549: quickfix test fails

Problem:    Quickfix test fails.
Solution:   Negate result of bt_quickfix().
diff --git a/src/version.c b/src/version.c
index 9d45703..4d49173 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1549,
+/**/
     1548,
 /**/
     1547,