Fix hash-table violation in trans-decl.c.

2018-10-31  Martin Liska  <mliska@suse.cz>

	* trans-decl.c (struct module_hasher): Call htab_hash_string
	for s->name and not for s.

From-SVN: r265663

gcc/fortran/ChangeLog

+2018-10-31  Martin Liska  <mliska@suse.cz>
+
+	* trans-decl.c (struct module_hasher): Call htab_hash_string
+	for s->name and not for s.
+
 2018-10-30  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/85896

gcc/fortran/trans-decl.c

@@ -4825,7 +4825,11 @@ struct module_hasher : ggc_ptr_hash<module_htab_entry>
 {
   typedef const char *compare_type;
 
-  static hashval_t hash (module_htab_entry *s) { return htab_hash_string (s); }
+  static hashval_t hash (module_htab_entry *s)
+  {
+    return htab_hash_string (s->name);
+  }
+
   static bool
   equal (module_htab_entry *a, const char *b)
   {