psxtests - Eliminate missing prototype warnings

testsuites/psxtests/psxusleep/init.c

@@ -1,5 +1,5 @@
 /*
- *  COPYRIGHT (c) 1989-2009.
+ *  COPYRIGHT (c) 1989-2012.
  *  On-Line Applications Research Corporation (OAR).
  *
  *  The license and distribution terms for this file may be
@@ -15,6 +15,9 @@
 #include <time.h>
 #include <errno.h>
 
+/* forward declarations to avoid warnings */
+rtems_task Init(rtems_task_argument argument);
+
 rtems_task Init(
   rtems_task_argument argument
 )