committed: Fix building of targets without SECONDARY_MEMORY_NEEDED

[Joern Rennecke]

Build-tested for mmix-knuth-mmixware.
Commited as obvious.

2012-10-30  Joern Rennecke  <joern.renne...@embecosm.com>

        * lra-constraints.c (check_secondary_memory_needed_p):
        Add ATTRIBUTE_UNUSED to parameters.

Index: lra-constraints.c
===================================================================
--- lra-constraints.c   (revision 192992)
+++ lra-constraints.c   (working copy)
@@ -3586,7 +3586,8 @@ skip_usage_debug_insns (rtx usage_insns)
    USAGE_INSNS after inserting inherited pseudo of class INHER_CL
    into the insn.  */
 static bool
-check_secondary_memory_needed_p (enum reg_class inher_cl, rtx usage_insns)
+check_secondary_memory_needed_p (enum reg_class inher_cl ATTRIBUTE_UNUSED,
+                                rtx usage_insns ATTRIBUTE_UNUSED)
 {
 #ifndef SECONDARY_MEMORY_NEEDED
   return false;