fix listview trace crash

[Dimitrie O. Paun]

On September 22, 2002 10:22 am, Rein Klazes wrote:
> Too early conclusion. At least this one is still needed or not fixed
> correctly.

Right! :) But this is more what we want there:

--- listview.c.org      2002-09-21 17:20:11.000000000 +0200
+++ listview.c  2002-09-22 16:06:23.000000000 +0200
@@ -4210,6 +4210,7 @@
 
   if ((nItem >= -1) && (lpFindInfo != NULL))
   {
+    lvItem.mask = 0;
     if (lpFindInfo->flags & LVFI_PARAM)
     {
       lvItem.mask |= LVIF_PARAM;