Bug 1143856 - Enable APZ on Linux desktop nightly builds. r=botond

--HG--
extra : commitid : 9RcxosSESx9

browser/app/profile/firefox.js

@@ -1885,7 +1885,7 @@ pref("browser.tabs.remote.autostart.2", true);
 #endif
 
 #ifdef NIGHTLY_BUILD
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#ifndef MOZ_MULET
 pref("layers.async-pan-zoom.enabled", true);
 #endif
 #endif