Added error in case auto_increment and default where defined

at the same time.

sql/sql_parse.cc

@@ -2880,21 +2880,29 @@ bool add_field_to_list(char *field_name, enum_field_types type,
     lex->col_list.empty();
   }
 
-  if (default_value && default_value->type() == Item::NULL_ITEM)
+  if (default_value)
+  {
+    if (default_value->type() == Item::NULL_ITEM)
     {
+      default_value=0;
       if ((type_modifier & (NOT_NULL_FLAG | AUTO_INCREMENT_FLAG)) ==
 	  NOT_NULL_FLAG)
       {
 	net_printf(&thd->net,ER_INVALID_DEFAULT,field_name);
 	DBUG_RETURN(1);
       }
-    default_value=0;
+    }
+    else if (type_modifier & AUTO_INCREMENT_FLAG)
+    {
+      net_printf(&thd->net, ER_INVALID_DEFAULT, field_name);
+      DBUG_RETURN(1);
+    }
   }
   if (!(new_field=new create_field()))
     DBUG_RETURN(1);
   new_field->field=0;
   new_field->field_name=field_name;
-  new_field->def= (type_modifier & AUTO_INCREMENT_FLAG ? 0 : default_value);
+  new_field->def= default_value;
   new_field->flags= type_modifier;
   new_field->unireg_check= (type_modifier & AUTO_INCREMENT_FLAG ?
 			    Field::NEXT_NUMBER : Field::NONE);