- pmore: fix movie -1f frame offset-by-one(line) index error.

git-svn-id: http://opensvn.csie.org/pttbbs/trunk/pttbbs@4093 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 3 insertions, 0 deletions

diff --git a/mbbsd/pmore.c b/mbbsd/pmore.c
index fde26f3a..a5829555 100644
--- a/mbbsd/pmore.c
+++ b/mbbsd/pmore.c
@@ -3085,6 +3085,9 @@ mf_movieGotoFrame(int fno, int relative)
                 mf_forward(1);
         } while (fno > 0);
     } else {
+        // For backward, the first call moves to beginning of file.
+        if (mf_backward(1) < 1)
+            return 0;
         // backward
         // XXX check if we reached head?
         while (fno < 0)