macosx: memleak due to unneeded strdup()

(cherry picked from commit 50b04778)
Signed-off-by: Derk-Jan Hartman <hartman@videolan.org>

modules/gui/macosx/playlist.m

@@ -1098,7 +1098,7 @@
     {
         for( i = 0; i < (int)[o_options count]; i++ )
         {
-            input_item_AddOption( p_input, strdup( [[o_options objectAtIndex:i] UTF8String] ),
+            input_item_AddOption( p_input, [[o_options objectAtIndex:i] UTF8String],
                                   VLC_INPUT_OPTION_TRUSTED );
         }
     }