wxwidgets 3.0: move FONT_* construction to SpectFrame

When using wxWidgets 3.0, creating a wxFont requires the gtk+
library to be initialized. This is causing espeakedit to segfault.

SpectFrame::Draw is the only place where the FONT_* variables are
used, so move them into the SpectFrame class and create them in
the constructor.

Also, FONT_NORMAL is not used so it has been removed.

src/espeakedit.cpp

@@ -96,10 +96,6 @@ int frame_x, frame_y, frame_w, frame_h;
 
 int adding_page = 0;   // fix for wxWidgets (2,8,7) bug, adding first page to a wxNotebook gives emptystring for GetPageTex() in Notebook_Page_Changed event.
 
-wxFont FONT_SMALL(8,wxSWISS,wxNORMAL,wxNORMAL);
-wxFont FONT_MEDIUM(9,wxSWISS,wxNORMAL,wxNORMAL);
-wxFont FONT_NORMAL(10,wxSWISS,wxNORMAL,wxNORMAL);
-
 IMPLEMENT_APP(MyApp)
 
 wxString AppName = _T("espeakedit");

src/main.h

@@ -111,10 +111,6 @@ extern wchar_t ipa1[256];
 
 
 
-extern wxFont FONT_SMALL;
-extern wxFont FONT_MEDIUM;
-extern wxFont FONT_NORMAL;
-
 enum {
 	MENU_QUIT = 1,
 	MENU_SPECTRUM,

src/spect.cpp

@@ -1,6 +1,7 @@
 /***************************************************************************
  *   Copyright (C) 2005 to 2007 by Jonathan Duddington                     *
  *   email: [email protected]                                    *
+ *   Copyright (C) 2013 by Reece H. Dunn                                   *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -92,6 +93,8 @@ float SpectTilt(int value, int freq)
 
 
 SpectFrame::SpectFrame(SpectFrame *copy)
+	: FONT_SMALL(8,wxSWISS,wxNORMAL,wxNORMAL)
+	, FONT_MEDIUM(9,wxSWISS,wxNORMAL,wxNORMAL)
 {//=====================================
 
 	int  ix;

src/spect.h

@@ -1,6 +1,7 @@
 /***************************************************************************
  *   Copyright (C) 2005 to 2007 by Jonathan Duddington                     *
  *   email: [email protected]                                    *
+ *   Copyright (C) 2013 by Reece H. Dunn                                   *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -171,6 +172,8 @@ public:
 private:
    void DrawPeaks(wxDC *dc, int offy, int frame_width, int seq_amplitude, double scalex);
 
+   wxFont FONT_SMALL;
+   wxFont FONT_MEDIUM;
 };
 
 class SpectSeq