Hans Leidekker : msi: Fix a double free.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 91ac47b84bc59617274783a431a5c46a36578ec2
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=91ac47b84bc59617274783a431a5c46a36578ec2

Author: Hans Leidekker <hans at codeweavers.com>
Date:   Mon Apr 20 16:08:26 2009 +0200

msi: Fix a double free.

TABLE_drop() calls TABLE_remove_column() which calls msi_update_table_columns()
which frees column info and possibly returns without reallocating. When that
happens it will be freed again when TABLE_drop() finally calls free_table().

---

 dlls/msi/table.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/dlls/msi/table.c b/dlls/msi/table.c
index ab86bcd..e7e2e68 100644
--- a/dlls/msi/table.c
+++ b/dlls/msi/table.c
@@ -1038,8 +1038,9 @@ static void msi_update_table_columns( MSIDATABASE *db, LPCWSTR name )
     table = find_cached_table( db, name );
     old_count = table->col_count;
     msi_free( table->colinfo );
-    table_get_column_info( db, name, &table->colinfo, &table->col_count );
+    table->colinfo = NULL;
 
+    table_get_column_info( db, name, &table->colinfo, &table->col_count );
     if (!table->col_count)
         return;