[gnumeric] xls: fix escher record length check.

[Morten Welinder <mortenw src gnome org>]

commit 5219768b4fc0898bea5d3babc8b1a9e8a6d4fc83
Author: Morten Welinder <terra gnome org>
Date:   Tue Jul 28 22:08:15 2015 -0400

    xls: fix escher record length check.
    
    1. The check against length of records should have been ">".
    2. But it's wrong in any case as we can get biff_continue records.

 plugins/excel/ms-escher.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/plugins/excel/ms-escher.c b/plugins/excel/ms-escher.c
index 739492a..c37647f 100644
--- a/plugins/excel/ms-escher.c
+++ b/plugins/excel/ms-escher.c
@@ -2104,8 +2104,10 @@ ms_escher_read_container (MSEscherState *state, MSEscherHeader *container,
                h.fbt   = GSF_LE_GET_GUINT16 (data + 2);
                datalen = GSF_LE_GET_GUINT32 (data + 4);
 
-               if (h.offset > state->end_offset || datalen >= MIN (0xfffffff0, (unsigned) (state->end_offset 
- h.offset))) {
-                       g_warning ("Crazy data length in escher record");
+               if (h.offset > state->end_offset || datalen >= 0xfffffff0) {
+                       g_warning ("Crazy data length in escher record.  (%d,%d,%d,%d)",
+                                  h.offset, state->end_offset, datalen,
+                                  (state->end_offset - h.offset));
                        ms_escher_header_release (&h);
                        return TRUE;
                }