From: Eli Zaretskii <eliz@gnu.org>
Date: Mon, 9 Jan 2012 09:27:02 +0000 (+0800)
Subject: Fix use of uninitialized variable (backport from trunk).
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Fix use of uninitialized variable (backport from trunk).

* xdisp.c (note_mouse_highlight): Initialize `part', to avoid a
possible random value that matches one of those tested as
condition to clear the mouse face.
---

diff --git a/src/ChangeLog b/src/ChangeLog
index c4a08bf0793..3730689e067 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2012-01-09  Eli Zaretskii  <eliz@gnu.org>
+
+	* xdisp.c (note_mouse_highlight): Initialize `part', to avoid a
+	possible random value that matches one of those tested as
+	condition to clear the mouse face.
+
 2012-01-09  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
 
 	* dispnew.c (scrolling_window): Truncate overlaps in copy
diff --git a/src/xdisp.c b/src/xdisp.c
index ebd660acc06..8e5cf3d8f3e 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -23484,7 +23484,7 @@ note_mouse_highlight (f, x, y)
      int x, y;
 {
   Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
-  enum window_part part;
+  enum window_part part = ON_NOTHING;
   Lisp_Object window;
   struct window *w;
   Cursor cursor = No_Cursor;