From e023de6da531091f22bb7cadcd81bd3e660b2e8c Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 31 Jan 2012 01:59:39 +0000
Subject: [PATCH] fix for crash while drag-creating a new MIDI note and
 dragging before the start of the region (from tophatdave

git-svn-id: svn://localhost/ardour2/branches/3.0@11396 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/editor_drag.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gtk2_ardour/editor_drag.cc b/gtk2_ardour/editor_drag.cc
index 692ca864b5..c0c73d40e5 100644
--- a/gtk2_ardour/editor_drag.cc
+++ b/gtk2_ardour/editor_drag.cc
@@ -4523,7 +4523,7 @@ NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 void
 NoteCreateDrag::motion (GdkEvent* event, bool)
 {
-	_note[1] = adjusted_current_frame (event) - _region_view->region()->position ();
+	_note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
 	double const x = _editor->frame_to_pixel (_note[1]);
 	if (_note[1] > _note[0]) {
 		_drag_rect->property_x2() = x;