[LyX/master] Do not try even to hide buffers that are being processed by LyX.

[Richard Heck]

commit a5ea77410e3acffb7f8ddd074a8c98f61dcdf95f
Author: Richard Heck <rgh...@lyx.org>
Date:   Sat Dec 12 12:57:33 2015 -0500

    Do not try even to hide buffers that are being processed by LyX.
    
    Should fix #9711.

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index 977395d..548381b 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -2819,7 +2819,7 @@ bool GuiView::closeWorkArea(GuiWorkArea * wa, bool 
close_buffer)
 
        Buffer & buf = wa->bufferView().buffer();
 
-       if (close_buffer && GuiViewPrivate::busyBuffers.contains(&buf)) {
+       if (GuiViewPrivate::busyBuffers.contains(&buf)) {
                Alert::warning(_("Close document"), 
                        _("Document could not be closed because it is being 
processed by LyX."));
                return false;