From 1174ecf6decf3c0dea9ef2348bcb91980e3f7b29 Mon Sep 17 00:00:00 2001
From: nyamatongwe <devnull@localhost>
Date: Sun, 3 Aug 2008 08:19:03 +0000
Subject: For bug #2030324 codument that HideLines can not hide line 0 and stop
 this from causing crash in code.

---
 doc/ScintillaDoc.html | 2 +-
 src/Editor.cxx        | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/ScintillaDoc.html b/doc/ScintillaDoc.html
index ee4e1670d..90d337529 100644
--- a/doc/ScintillaDoc.html
+++ b/doc/ScintillaDoc.html
@@ -4178,7 +4178,7 @@ sptr_t CallScintilla(unsigned int iMessage, uptr_t wParam, sptr_t lParam){
      The first two messages mark a range of lines as visible or invisible and then redraw the
     display. The third message reports on the visible state of a line and returns 1 if it is
     visible and 0 if it is not visible. These messages have no effect on fold levels or fold
-    flags.</p>
+    flags. The first line can not be hidden.</p>
 
     <p><b id="SCI_SETFOLDLEVEL">SCI_SETFOLDLEVEL(int line, int level)</b><br />
      <b id="SCI_GETFOLDLEVEL">SCI_GETFOLDLEVEL(int line)</b><br />
diff --git a/src/Editor.cxx b/src/Editor.cxx
index 95664e2b1..c72fc96d0 100644
--- a/src/Editor.cxx
+++ b/src/Editor.cxx
@@ -7027,7 +7027,8 @@ sptr_t Editor::WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam) {
 		break;
 
 	case SCI_HIDELINES:
-		cs.SetVisible(wParam, lParam, false);
+		if (wParam > 0)
+			cs.SetVisible(wParam, lParam, false);
 		SetScrollBars();
 		Redraw();
 		break;
-- 
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