Fix some minor glitches with Haiku scroll bars

* src/haiku_support.cc (MouseDown): Don't start overscroll if
dragging started inside a button.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/haiku_support.cc b/src/haiku_support.cc
index 27d4bbafaf7..4bd801242af 100644
--- a/src/haiku_support.cc
+++ b/src/haiku_support.cc
@@ -1785,7 +1785,6 @@ public:
 
     if (buttons == B_PRIMARY_MOUSE_BUTTON)
       {
-        maybe_overscroll = true;
         r = ButtonRegionFor (HAIKU_SCROLL_BAR_UP_BUTTON);
 
         if (r.Contains (pt))
@@ -1813,6 +1812,8 @@ public:
             haiku_write (SCROLL_BAR_PART_EVENT, &part);
             goto out;
           }
+
+        maybe_overscroll = true;
       }
 
     rq.dragging_p = 1;