fixed merge problem (bk commit - 5.1 tree (anozdrin:1.2163)

    (approved by kostja)

libmysql/libmysql.c

@@ -2816,6 +2816,7 @@ my_bool STDCALL mysql_stmt_attr_get(MYSQL_STMT *stmt,
 {
   switch (attr_type) {
   case STMT_ATTR_UPDATE_MAX_LENGTH:
+    *(my_bool*) value= stmt->update_max_length;
     break;
   case STMT_ATTR_CURSOR_TYPE:
     *(ulong*) value= stmt->flags;