intf.m: * we can't localise empty strings, so don't put an error when trying...

intf.m: * we can't localise empty strings, so don't put an error when trying to do so, but just a warning
    * be a bit nicer and return @"" instead of NULL strings
    - this fixes the display of certain modules in the preferences such as the parametric equaliser

prefs.m: * removed 2 unused variables

modules/gui/macosx/intf.m

@@ -654,10 +654,17 @@ static VLCMain *_o_sharedMainInstance = nil;
     if( psz != NULL )
     {
         o_str = [[[NSString alloc] initWithUTF8String: psz] autorelease];
-    }
+
         if ( o_str == NULL )
         {
             msg_Err( VLCIntf, "could not translate: %s", psz );
+            return( @"" );
+        }
+    }
+    else
+    {
+        msg_Warn( VLCIntf, "can't translate empty strings" );
+        return( @"" );
     }
 
     return( o_str );

modules/gui/macosx/prefs.m

@@ -315,10 +315,10 @@ static VLCTreeItem *o_root_item = nil;
 			            if( p_item->i_value == -1 ) break;
 
                         o_child_name = [[VLCMain sharedInstance]
-                            localizedString: config_CategoryNameGet( p_item->i_value ) ];
+                            localizedString: config_CategoryNameGet( p_item->i_value )];
                         o_child_title = o_child_name;
                         o_child_help = [[VLCMain sharedInstance]
-                            localizedString: config_CategoryHelpGet( p_item->i_value ) ];
+                            localizedString: config_CategoryHelpGet( p_item->i_value )];
                         p_last_category = [VLCTreeItem alloc];
                         [o_children addObject:[p_last_category
                             initWithName: o_child_name
@@ -546,7 +546,6 @@ static VLCTreeItem *o_root_item = nil;
                 return nil;
             }
             p_item = p_parser->p_config;
-            int i = 0;
 
             p_item = p_parser->p_config + 1;
 
@@ -589,7 +588,6 @@ static VLCTreeItem *o_root_item = nil;
         }
         else
         {
-            int i = 0;
             int i_index;
             p_list = vlc_list_find( p_intf, VLC_OBJECT_MODULE, FIND_ANYWHERE );
             if( !p_list ) return o_view;