[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);
    	}
    }