fixup hash table descriptor in winnt.c

gcc/ChangeLog:

2015-05-19  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	PR c++/65835
	* config/i386/winnt.c (struct wrapped_symbol_hasher): Change
	value_type to const char *.

From-SVN: r223423

gcc/ChangeLog

+2015-05-19  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
+	PR c++/65835
+	* config/i386/winnt.c (struct wrapped_symbol_hasher): Change
+	value_type to const char *.
+
 2015-05-19  Sandra Loosemore  <sandra@codesourcery.com>
 
 	* config.gcc [powerpc*-*-linux*]: Allow --enable-targets=all

gcc/config/i386/winnt.c

@@ -738,11 +738,11 @@ i386_pe_record_stub (const char *name)
 
 struct wrapped_symbol_hasher : typed_noop_remove <char>
 {
-  typedef char *value_type;
-  typedef char *compare_type;
+  typedef const char *value_type;
+  typedef const char *compare_type;
   static inline hashval_t hash (const char *);
   static inline bool equal (const char *, const char *);
-  static inline void remove (char *);
+  static inline void remove (const char *);
 };
 
 inline hashval_t