From: Alan Third <alan@idiocy.org>
Date: Fri, 12 Oct 2018 20:45:03 +0000 (+0100)
Subject: Ensure NS frame is redrawn correctly  after scroll
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Ensure NS frame is redrawn correctly  after scroll

* src/nsterm.m (ns_copy_bits): Set needsDisplay so the previous cursor
position is redrawn.
---

diff --git a/src/nsterm.m b/src/nsterm.m
index d92d6c32448..8c355a89f8f 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -2721,6 +2721,7 @@ ns_copy_bits (struct frame *f, NSRect src, NSRect dest)
       [FRAME_NS_VIEW (f) scrollRect: src
                                  by: NSMakeSize (dest.origin.x - src.origin.x,
                                                  dest.origin.y - src.origin.y)];
+      [FRAME_NS_VIEW (f) setNeedsDisplay:YES];
     }
 }