(PP_MAIN): New.

(empth_init): Use it rather than literal.

include/player.h

@@ -92,6 +92,7 @@ enum {
 };
 
 /* thread priorities */
+#define PP_MAIN		7
 #define PP_UPDATE	6
 #define PP_SHUTDOWN	5
 #define PP_SCHED	4

src/lib/empthread/lwp.c

@@ -40,7 +40,7 @@
 int
 empth_init(void **ctx, int flags)
 {
-    lwpInitSystem(7, (char **)ctx, flags);
+    lwpInitSystem(PP_MAIN, (char **)ctx, flags);
     return 0;
 }