Minor clean up, move common define to a header file and use TIME_AFTER macro

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18783 a1c6a512-1295-4272-9138-f99709370657

apps/playlist.c

@@ -136,8 +136,6 @@
 #define PLAYLIST_QUEUED                 0x20000000
 #define PLAYLIST_SKIPPED                0x10000000
 
-#define PLAYLIST_DISPLAY_COUNT          10
-
 struct directory_search_context {
     struct playlist_info* playlist;
     int position;
@@ -2040,7 +2038,7 @@ int playlist_resume(void)
         for(count=0; count<nread && !exit_loop && !useraborted; count++,p++)
         {
             /* So a splash while we are loading. */
-            if (current_tick - last_tick > HZ/4)
+            if (TIME_AFTER(current_tick, last_tick + HZ/4))
             {
                 splashf(0, str(LANG_LOADING_PERCENT), 
                            (total_read+count)*100/control_file_size,

apps/playlist.h

@@ -32,6 +32,8 @@
 #define PLAYLIST_ATTR_SKIPPED   0x04
 #define PLAYLIST_MAX_CACHE      16
 
+#define PLAYLIST_DISPLAY_COUNT  10
+
 #define DEFAULT_DYNAMIC_PLAYLIST_NAME "/dynamic.m3u8"
 
 enum playlist_command {

apps/playlist_catalog.c

@@ -46,7 +46,6 @@
 #include "talk.h"
 
 #define MAX_PLAYLISTS 400
-#define PLAYLIST_DISPLAY_COUNT 10
 
 /* Use for recursive directory search */
 struct add_track_context {