Bug 783505 - OS X gcc builds failing. r=jorendorff.

This patch adds a workaround for
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39608

js/src/jstypedarray.cpp

@@ -1423,8 +1423,14 @@ class TypedArrayTemplate
     Getter(JSContext *cx, unsigned argc, Value *vp)
     {
         CallArgs args = CallArgsFromVp(argc, vp);
+        // FIXME: Hack to keep us building with gcc 4.2. Remove this once we
+        // drop support for gcc 4.2. See bug 783505 for the details.
+#if defined(__GNUC__) && __GNUC_MINOR__ <= 2
+        return CallNonGenericMethod(cx, IsThisClass, GetterImpl<ValueGetter>, args);
+#else
         return CallNonGenericMethod<ThisTypeArray::IsThisClass,
                                     ThisTypeArray::GetterImpl<ValueGetter> >(cx, args);
+#endif
     }
 
     // Define an accessor for a read-only property that invokes a native getter