PATCH: check before accessing parts in Statusbar

[mehmet yasar]

Hi,

This patch fixes crash with Xnview, this app creates a 2 part status bar
and then tries to get text from part 7 ;-)

Fortunately (or unfortunately) that worked until now since we were
luckily pointing to memory which was NULL.

So my patch is adding new checks in SB_SETTEXT / SB_GETTEXT before
trying to access data.

Mehmet

Changelog:
	Add more check inside SB_SETTEXT and SB_GETTEXT


-------------- next part --------------
--- CVS/wine/dlls/comctl32/status.c	Tue Apr  9 13:07:02 2002
+++ wine/winelatest/dlls/comctl32/status.c	Thu Apr 11 14:09:08 2002
@@ -393,6 +393,8 @@
     LRESULT result;
 
     TRACE("part %d\n", nPart);
+    if (nPart < 0 || nPart >= infoPtr->numParts) return 0;
+
     if (infoPtr->simple)
 	part = &infoPtr->part0;
     else
@@ -418,6 +420,8 @@
     LRESULT result;
 
     TRACE("part %d\n", nPart);
+    if (nPart < 0 || nPart >= infoPtr->numParts) return 0;
+
     if (infoPtr->simple)
 	part = &infoPtr->part0;
     else
@@ -646,6 +650,7 @@
     BOOL changed = FALSE;
 
     TRACE("part %d, text %s\n", nPart, debugstr_t(text, isW));
+    if (nPart < 0 || nPart >= infoPtr->numParts) return FALSE;
 
     if (nPart == 0x00ff)
 	part = &infoPtr->part0;