From 30317efa037aac6e99b0133326f6a7bf12ac553a Mon Sep 17 00:00:00 2001
From: Paul Licameli <paul.licameli@audacityteam.org>
Date: Sun, 25 Jun 2017 13:19:44 -0400
Subject: [PATCH] fix Windows build

---
 src/prefs/PrefsPanel.h      | 2 +-
 src/prefs/SpectrumPrefs.cpp | 4 +++-
 src/prefs/SpectrumPrefs.h   | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/prefs/PrefsPanel.h b/src/prefs/PrefsPanel.h
index fa18b710b..d5680defb 100644
--- a/src/prefs/PrefsPanel.h
+++ b/src/prefs/PrefsPanel.h
@@ -53,7 +53,7 @@ class PrefsPanel /* not final */ : public wxPanelWrapper
    virtual ~PrefsPanel();
 
    // NEW virtuals
-   virtual bool Preview() {} // Make tentative changes
+   virtual void Preview() {} // Make tentative changes
    virtual bool Commit() = 0; // used to be called "Apply"
 
    // If it returns True, the Preview button is added below the panel
diff --git a/src/prefs/SpectrumPrefs.cpp b/src/prefs/SpectrumPrefs.cpp
index d52fa31cf..33225f1a9 100644
--- a/src/prefs/SpectrumPrefs.cpp
+++ b/src/prefs/SpectrumPrefs.cpp
@@ -416,7 +416,7 @@ void SpectrumPrefs::Rollback()
    }
 }
 
-bool SpectrumPrefs::Preview()
+void SpectrumPrefs::Preview()
 {
    if (!Validate())
       return false;
@@ -487,6 +487,8 @@ bool SpectrumPrefs::Commit()
       SpectrogramSettings *const pSettings = &SpectrogramSettings::defaults();
       pSettings->SavePrefs();
    }
+
+   return true;
 }
 
 bool SpectrumPrefs::ShowsPreviewButton()
diff --git a/src/prefs/SpectrumPrefs.h b/src/prefs/SpectrumPrefs.h
index 8f0036cc2..ac4c7caca 100644
--- a/src/prefs/SpectrumPrefs.h
+++ b/src/prefs/SpectrumPrefs.h
@@ -44,7 +44,7 @@ class SpectrumPrefs final : public PrefsPanel
  public:
    SpectrumPrefs(wxWindow * parent, WaveTrack *wt);
    virtual ~SpectrumPrefs();
-   bool Preview() override;
+   void Preview() override;
    bool Commit() override;
    void Rollback();
    bool ShowsPreviewButton() override;