Fix various segfaults and heap trashes. Thanks to Andrew Mobbs.

[u/mdw/putty] / window.c

diff --git a/window.c b/window.c
index 3cd719a..456f1ef 100644 (file)
--- a/window.c
+++ b/window.c
@@ -1347,7 +1347,8 @@ void set_sbar (int total, int start, int page) {
     si.nMax = total - 1;
     si.nPage = page;
     si.nPos = start;
-    SetScrollInfo (hwnd, SB_VERT, &si, TRUE);
+    if (hwnd)
+        SetScrollInfo (hwnd, SB_VERT, &si, TRUE);
 }
 
 Context get_ctx() {