[artwork] Define MEDIA_KIND_ALL as USHRT_MAX instead of individual num values

src/db.h

@@ -5,6 +5,7 @@
 #include <time.h>
 #include <stddef.h>
 #include <stdint.h>
+#include <limits.h>
 
 #include "outputs.h"
 
@@ -121,7 +122,7 @@ enum media_kind {
   MEDIA_KIND_TVSHOW = 64,
 };
 
-#define MEDIA_KIND_ALL (1 | 2 | 4 | 8 | 32 | 64)
+#define MEDIA_KIND_ALL USHRT_MAX
 
 const char *
 db_media_kind_label(enum media_kind media_kind);