Daniel Beitler : msi: Prevent call to memset with a null pointer in get_tablecolumns function.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: deb274226783ab886bdb44876944e156757efe2b
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=deb274226783ab886bdb44876944e156757efe2b

Author: Daniel Beitler <dan at dablabs.com>
Date:   Sun May 18 13:27:42 2014 -0400

msi: Prevent call to memset with a null pointer in get_tablecolumns function.

---

 dlls/msi/table.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/msi/table.c b/dlls/msi/table.c
index 8012369..9ed9421 100644
--- a/dlls/msi/table.c
+++ b/dlls/msi/table.c
@@ -671,7 +671,7 @@ static UINT get_tablecolumns( MSIDATABASE *db, LPCWSTR szTableName, MSICOLUMNINF
     /* Note: _Columns table doesn't have non-persistent data */
 
     /* if maxcount is non-zero, assume it's exactly right for this table */
-    memset( colinfo, 0, maxcount * sizeof(*colinfo) );
+    if (colinfo) memset( colinfo, 0, maxcount * sizeof(*colinfo) );
     count = table->row_count;
     for (i = 0; i < count; i++)
     {
@@ -684,7 +684,7 @@ static UINT get_tablecolumns( MSIDATABASE *db, LPCWSTR szTableName, MSICOLUMNINF
             /* check the column number is in range */
             if (col < 1 || col > maxcount)
             {
-                ERR("column %d out of range\n", col);
+                ERR("column %d out of range (maxcount: %d)\n", col, maxcount);
                 continue;
             }
             /* check if this column was already set */