Bug 1262634 - Avoid undefined reference to moz_gtk_get_entry_min_height in builds specifying cairo-gtk2 toolkit. r=karlt

--HG--
extra : histedit_source : 160487a1e3dcfea56c38b88308fbff41724c33b7

widget/gtk/nsNativeThemeGTK.cpp

@@ -1591,12 +1591,14 @@ nsNativeThemeGTK::GetMinimumWidgetSize(nsPresContext* aPresContext,
       aResult->height += border.top + border.bottom;
     }
     break;
+#if (MOZ_WIDGET_GTK == 3)
   case NS_THEME_NUMBER_INPUT:
   case NS_THEME_TEXTFIELD:
     {
       moz_gtk_get_entry_min_height(&aResult->height);
     }
     break;
+#endif
   case NS_THEME_TOOLBAR_SEPARATOR:
     {
       gint separator_width;