trying to get the export dialog for zip files.

src/slic3r/GUI/GUI_App.cpp

@@ -48,6 +48,7 @@ const wxString file_wildcards[FT_SIZE] = {
 
     /* FT_INI */   "INI files *.ini|*.ini;*.INI",
     /* FT_SVG */   "SVG files *.svg|*.svg;*.SVG",
+    /* FT_PNGZIP */"Zipped PNG files *.zip|*.zip;*.ZIP",    // This is lame, but that's what we use for SLA
 };
 
 
@@ -715,4 +716,4 @@ wxNotebook* GUI_App::tab_panel() const
 
 
 } // GUI
-} //Slic3r
+} //Slic3r