Handle LB_ERR (or indicated psooible error)

[Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>]

Changelog:
	controls/combo.c: CBUpdateEdit
	LB_GETTEXTLEN returns LB_ERR on error, not NULL
-- 
Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de

Free Software: If you contribute nothing, expect nothing
--
Index: wine/controls/combo.c
===================================================================
RCS file: /home/wine/wine/controls/combo.c,v
retrieving revision 1.84
diff -u -r1.84 combo.c
--- wine/controls/combo.c	13 Jun 2002 19:20:43 -0000	1.84
+++ wine/controls/combo.c	9 Jul 2002 21:51:53 -0000
@@ -771,6 +771,8 @@
    if( (id = SendMessageW(lphc->hWndLBox, LB_GETCURSEL, 0, 0) ) != LB_ERR )
    {
         size = SendMessageW(lphc->hWndLBox, LB_GETTEXTLEN, id, 0);
+	if (size == LB_ERR)
+	  FIXME("LB_ERR probably not handled yet\n");
         if( (pText = HeapAlloc( GetProcessHeap(), 0, (size + 1) * sizeof(WCHAR))) )
 	{
             /* size from LB_GETTEXTLEN may be too large, from LB_GETTEXT is accurate */
@@ -1113,7 +1115,7 @@
    if( index >= 0 ) /* got an entry */
    {
        length = SendMessageW(lphc->hWndLBox, LB_GETTEXTLEN, (WPARAM)index, 0);
-       if( length )
+       if( length != LB_ERR)
        {
 	   if( (pText = HeapAlloc( GetProcessHeap(), 0, (length + 1) * sizeof(WCHAR))) )
 	   {
@@ -1538,7 +1540,8 @@
 	   INT n = 0;
            INT length = SendMessageW(lphc->hWndLBox, LB_GETTEXTLEN,
 					        (WPARAM)idx, 0 );
-
+	   if(length == LB_ERR)
+	     FIXME("LB_ERR probably not handled yet\n");
 	    if(unicode)
 	    {
 		LPWSTR lpBuffer, lpText = (LPWSTR)lParam;