fixed "index out of range"

Modified: trunk/reactos/subsys/system/welcome/welcome.c

--- trunk/reactos/subsys/system/welcome/welcome.c	2005-10-17 12:41:52 UTC (rev 18516)
+++ trunk/reactos/subsys/system/welcome/welcome.c	2005-10-17 12:44:16 UTC (rev 18517)
@@ -566,7 +566,7 @@

 	     0,
 	     SRCCOPY);
     }

-  else if (hTopicBitmap[nTopic] != 0)

+  else if ((nTopic != -1) && (hTopicBitmap[nTopic] != 0))

     {
       GetObject(hTopicBitmap[nTopic], sizeof(BITMAP), &bmpInfo);
       hOldBitmap = SelectObject (hdcMem, hTopicBitmap[nTopic]);