Convert return value to bool for fpm_worker_pool_init_main()

The return value was always either 0 or -1

Author: Girgias

sapi/fpm/fpm/fpm.c

@@ -63,7 +63,7 @@ int fpm_init(int argc, char **argv, char *config, char *prefix, char *pid, int t
 	    !fpm_signals_init_main()       ||
 	    !fpm_children_init_main()      ||
 	    !fpm_sockets_init_main()       ||
-	    0 > fpm_worker_pool_init_main()   ||
+	    !fpm_worker_pool_init_main()   ||
 	    !fpm_event_init_main()) {
 
 		if (fpm_globals.test_successful) {

sapi/fpm/fpm/fpm_worker_pool.c

@@ -78,10 +78,7 @@ struct fpm_worker_pool_s *fpm_worker_pool_alloc(void)
 	return ret;
 }
 
-int fpm_worker_pool_init_main(void)
+bool fpm_worker_pool_init_main(void)
 {
-	if (!fpm_cleanup_add(FPM_CLEANUP_ALL, fpm_worker_pool_cleanup, 0)) {
-		return -1;
-	}
-	return 0;
+	return fpm_cleanup_add(FPM_CLEANUP_ALL, fpm_worker_pool_cleanup, 0);
 }

sapi/fpm/fpm/fpm_worker_pool.h

@@ -49,7 +49,7 @@ struct fpm_worker_pool_s {
 
 struct fpm_worker_pool_s *fpm_worker_pool_alloc(void);
 void fpm_worker_pool_free(struct fpm_worker_pool_s *wp);
-int fpm_worker_pool_init_main(void);
+bool fpm_worker_pool_init_main(void);
 
 void fpm_worker_pool_free_limit_extensions(char **limit_extensions);