Got rid of HEAP_strdupW.

diff --git a/windows/mdi.c b/windows/mdi.c
index cfad061..36a47cc 100644
--- a/windows/mdi.c
+++ b/windows/mdi.c
@@ -1183,7 +1183,8 @@
     if (lpTitle) 
     {
 	if (ci->frameTitle) HeapFree( GetProcessHeap(), 0, ci->frameTitle );
-	ci->frameTitle = HEAP_strdupW( GetProcessHeap(), 0, lpTitle );
+	if ((ci->frameTitle = HeapAlloc( GetProcessHeap(), 0, (strlenW(lpTitle)+1)*sizeof(WCHAR))))
+            strcpyW( ci->frameTitle, lpTitle );
     }
 
     if (ci->frameTitle)