[LyX/master] Fix regression introduced in a65f1e54dc

[Juergen Spitzmueller]

commit 254affa0b9232533daaed1301e194a0b7726c777
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Fri Dec 28 17:25:53 2018 +0100

    Fix regression introduced in a65f1e54dc
---
 src/frontends/qt4/GuiToolbar.cpp |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt4/GuiToolbar.cpp b/src/frontends/qt4/GuiToolbar.cpp
index 8d63866..939ea7f 100644
--- a/src/frontends/qt4/GuiToolbar.cpp
+++ b/src/frontends/qt4/GuiToolbar.cpp
@@ -368,8 +368,8 @@ void DynamicMenuButton::updateTriggered()
        } else if (menutype == "textstyle-apply") {
                m->clear();
                setPopupMode(QToolButton::MenuButtonPopup);
-               QToolButton::setIcon(getIcon(FuncRequest(LFUN_TEXTSTYLE_APPLY), 
false));
                if (!bv) {
+                       
QToolButton::setIcon(getIcon(FuncRequest(LFUN_TEXTSTYLE_APPLY), false));
                        setEnabled(false);
                        return;
                }
@@ -396,6 +396,7 @@ void DynamicMenuButton::updateTriggered()
                m->addAction(reset_act);
                if (default_act)
                        QToolButton::setDefaultAction(default_act);
+               QToolButton::setIcon(getIcon(FuncRequest(LFUN_TEXTSTYLE_APPLY), 
false));
                
setEnabled(lyx::getStatus(FuncRequest(LFUN_TEXTSTYLE_APPLY)).enabled()
                           || 
lyx::getStatus(FuncRequest(LFUN_FONT_DEFAULT)).enabled());
        } else if (menutype == "paste") {