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[PATCH] [COMMITTED 3.4/3.5] Maybe Fix Java Bootstrap on powerpc

I did not expect NULLs in the field's chain, I had only built with C, C++, Objc, and f77.
This patch fixes that by checking for NULL and making sure that it does not seg fault.
Committed to the mainline and 3.4 branch as obvious.


	* config/rs6000/rs6000.c (rs6000_special_round_type_align):
	Check for NULL in the chain and remove repeated code.

Index: rs6000.c
RCS file: /cvs/gcc/gcc/gcc/config/rs6000/rs6000.c,v
retrieving revision 1.579
diff -u -p -r1.579 rs6000.c
--- rs6000.c 18 Jan 2004 03:46:55 -0000 1.579
+++ rs6000.c 18 Jan 2004 15:42:56 -0000
@@ -2325,15 +2325,13 @@ unsigned int
rs6000_special_round_type_align (tree type, int computed, int specified)
tree field = TYPE_FIELDS (type);
- if (!field)
- return MAX (computed, specified);

   /* Skip all the static variables only if ABI is greater than
      1 or equal to 0.   */
-  while (TREE_CODE (field) == VAR_DECL)
+  while (field != NULL && TREE_CODE (field) == VAR_DECL)
     field = TREE_CHAIN (field);

-  if (field == type || DECL_MODE (field) != DFmode)
+  if (field == NULL || field == type || DECL_MODE (field) != DFmode)
     return MAX (computed, specified);

return MAX (MAX (computed, specified), 64);

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