[weiden] 19842: get the root fcb when creating a file and no parent fcb is returned

get the root fcb when creating a file and no parent fcb is returned
Modified: trunk/reactos/drivers/fs/vfat/create.c
  _____
Modified: trunk/reactos/drivers/fs/vfat/create.c
--- trunk/reactos/drivers/fs/vfat/create.c      2005-12-03 17:33:41 UTC
(rev 19841)
+++ trunk/reactos/drivers/fs/vfat/create.c      2005-12-03 18:16:02 UTC
(rev 19842)
@@ -564,6 +564,11 @@
                    RequestedDisposition == FILE_SUPERSEDE)
                {
                        ULONG Attributes;
+                       if (ParentFcb == NULL)
+                       {
+                               ParentFcb = vfatOpenRootFCB (DeviceExt);
+                               ASSERT(ParentFcb != NULL);
+                       }
                        Attributes =
Stack->Parameters.Create.FileAttributes;
                        vfatSplitPathName(&PathNameU, NULL, &FileNameU);
@@ -600,7 +605,10 @@
                }
                else
                {
-                       vfatReleaseFCB (DeviceExt, ParentFcb);
+                       if (ParentFcb)
+                       {
+                               vfatReleaseFCB (DeviceExt, ParentFcb);
+                       }
                        return(Status);
                }
        }