patch 9.0.0577: buffer underflow with unexpected :finally

Problem:    Buffer underflow with unexpected :finally.
Solution:   Check CSF_TRY can be found.
diff --git a/src/version.c b/src/version.c
index b3efbbe..942a783 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    577,
+/**/
     576,
 /**/
     575,