From 203f4d8c7ee41b429bb4dbfabe1e2aef3dcbf85f Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Tue, 24 May 2011 10:20:25 +0000
Subject: Fix STR #2643: derefenced NULL pointer, if Xinerama is available, but
 inactive.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8733 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/screen_xywh.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/screen_xywh.cxx b/src/screen_xywh.cxx
index 410e4eb9e..32d151f5e 100644
--- a/src/screen_xywh.cxx
+++ b/src/screen_xywh.cxx
@@ -237,7 +237,7 @@ void Fl::screen_xywh(int &X, int &Y, int &W, int &H, int mx, int my) {
     }
   }
 #elif HAVE_XINERAMA
-  if (num_screens > 0) {
+  if (num_screens > 0 && screens) { // screens == NULL if !XineramaIsActive(fl_display)
     int i;
 
     for (i = 0; i < num_screens; i ++) {
-- 
cgit v1.2.3