Fix some deprecated functions

* src/nsterm.m (firstRectForCharacterRange): In OS X >10.6 replace
convertBaseToScreen with convertRectToScreen.
* src/nsmenu.m (ns_update_menubar): Remove attachedMenu, deprecated in
OS X 10.2, and always seems to return nil.

src/nsmenu.m

@@ -136,12 +136,6 @@
       menu = [[EmacsMenu alloc] initWithTitle: ns_app_name];
       needsSet = YES;
     }
-  else
-    {  /* close up anything on there */
-      id attMenu = [menu attachedMenu];
-      if (attMenu != nil)
-        [attMenu close];
-    }
 
 #if NSMENUPROFILE
   ftime (&tb);

src/nsterm.m

@@ -6191,8 +6191,14 @@ - (NSRect)firstRectForCharacterRange: (NSRange)theRange
                                        +FRAME_LINE_HEIGHT (emacsframe));
 
   pt = [self convertPoint: pt toView: nil];
+#if !defined (NS_IMPL_COCOA) || \
+  MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
   pt = [[self window] convertBaseToScreen: pt];
   rect.origin = pt;
+#else
+  rect.origin = pt;
+  rect = [[self window] convertRectToScreen: rect];
+#endif
   return rect;
 }