voice: fix regression 39f8685 (already voiced)

Some of the splashf messages that were converted
to support voicing in commit 39f8685 already had
a voice equivalent that was more appropriate,
since it also voiced parameters, and included
pauses between announcements where necessary.

Change-Id: Ia91a01c82acd6148afb4afadd64b1105802aea36

apps/playlist.c

@@ -684,7 +684,7 @@ static void display_playlist_count(int count, const unsigned char *fmt,
         }
     }
 
-    splashf(0, fmt, count, str(LANG_OFF_ABORT));
+    splashf(0, P2STR(fmt), count, str(LANG_OFF_ABORT)); /* (voiced above) */
 }
 
 /*