master e547ca1f89: Fix some minor glitches with Haiku scroll bars

[Po Lu]

branch: master
commit e547ca1f8953ebbcd3bb65acc6eac34335ab3826
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix some minor glitches with Haiku scroll bars
    
    * src/haiku_support.cc (MouseDown): Don't start overscroll if
    dragging started inside a button.
---
 src/haiku_support.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/haiku_support.cc b/src/haiku_support.cc
index 27d4bbafaf..4bd801242a 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;