wxUSE_FONTDLG is optional.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27748 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fontmap.cpp

@@ -468,6 +468,8 @@ bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
         }
     }
     //else: we're in non-interactive mode
+#else
+    wxUnusedVar(equivEncoding);
 #endif // wxUSE_FONTDLG
 
     return foundEquivEncoding;