Fix minor oversight in stack checking patch series

Fix minor oversight in stack checking patch series

[Eric Botcazou]

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We don't need to initialize stack_check_probe_note in all cases now, but only 
if the mechanism is the generic one.

Tested on i586-suse-linux, applied on the mainline as obvious.


2011-05-11  Eric Botcazou  <ebotcazou@adacore.com>

	* function.c (expand_function_start): Initialize stack_check_probe_note
	only if the generic stack checking mechanism is used.


-- 
Eric Botcazou

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Index: function.c
===================================================================
--- function.c	(revision 173643)
+++ function.c	(working copy)
@@ -4813,9 +4813,8 @@ expand_function_start (tree subr)
 #endif
     }
 
-  /* After the display initializations is where the stack checking
-     probe should go.  */
-  if(flag_stack_check)
+  /* If we are doing generic stack checking, the probe should go here.  */
+  if (flag_stack_check == GENERIC_STACK_CHECK)
     stack_check_probe_note = emit_note (NOTE_INSN_DELETED);
 
   /* Make sure there is a line number after the function entry setup code.  */