Use only wxFont ctor from wxFontInfo in the samples

Follow the documentation advice and prefer to use the ctor taking
wxFontInfo as it makes the code slightly shorter and more readable.

samples/opengl/pyramid/pyramid.cpp

@@ -489,7 +489,7 @@ bool MyGLCanvas::oglInit()
     int swi = 0, shi = 0; //Image sizes
     wxString stg("wxWidgets");
     // Set the font. Use a big pointsize so as to smoothing edges.
-    wxFont font(48, wxFONTFAMILY_MODERN, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
+    wxFont font(wxFontInfo(48).Family(wxFONTFAMILY_MODERN));
     if ( !font.IsOk() )
         font = *wxSWISS_FONT;
     wxColour bgrdColo(*wxBLACK);