Fix --enable-checking=fold failure.

	gcc/
	* fold-const.c (fold_checksum_tree): Look at DECL_VINDEX only for
	FUNCTION_DECLs.

From-SVN: r212428

gcc/ChangeLog

+2014-07-10  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* fold-const.c (fold_checksum_tree): Look at DECL_VINDEX only for
+	FUNCTION_DECLs.
+
 2014-07-10  Eric Botcazou  <ebotcazou@adacore.com>
 
 	PR middle-end/53590

gcc/fold-const.c

@@ -14858,6 +14858,7 @@ fold_checksum_tree (const_tree expr, struct md5_ctx *ctx,
 
       if (CODE_CONTAINS_STRUCT (TREE_CODE (expr), TS_DECL_NON_COMMON))
 	{
+	  if (TREE_CODE (expr) == FUNCTION_DECL)
 	    fold_checksum_tree (DECL_VINDEX (expr), ctx, ht);
 	  fold_checksum_tree (DECL_RESULT_FLD (expr), ctx, ht);
 	  fold_checksum_tree (DECL_ARGUMENT_FLD (expr), ctx, ht);