Initialize 'str' in ICONTITLE_GetTitlePos.

controls/icontitle.c

diff --git a/controls/icontitle.c b/controls/icontitle.c
index f209e5a..e2ac64a 100644
--- a/controls/icontitle.c
+++ b/controls/icontitle.c
@@ -65,7 +65,7 @@
 static BOOL ICONTITLE_GetTitlePos( WND* wnd, LPRECT lpRect )
 {
     static WCHAR emptyTitleText[] = {'<','.','.','.','>',0};
-    LPWSTR str;
+    LPWSTR str = NULL;
     int length = lstrlenW( wnd->owner->text );
 
     if( length )