[LyX/master] Set enable for both cases

[Scott Kostyshak]

commit a64a2d0ab7884aac6cafb2416f4bcede3cf1377a
Author: Scott Kostyshak <skost...@lyx.org>
Date:   Wed Apr 8 12:58:03 2015 -0400

    Set enable for both cases
    
    Thanks to Jürgen.

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index e85d042..5e8893b 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -1924,8 +1924,7 @@ bool GuiView::getStatus(FuncRequest const & cmd, 
FuncStatus & flag)
        case LFUN_BUFFER_NEXT:
        case LFUN_BUFFER_PREVIOUS:
                // because we cycle, it doesn't matter whether on first or last
-               if (d.currentTabWorkArea()->count() <= 1)
-                       enable = false;
+               enable = (d.currentTabWorkArea()->count() > 1);
                break;
        case LFUN_BUFFER_SWITCH:
                // toggle on the current buffer, but do not toggle off