More after-merge fixes for merging MySQL 5.1.38 into MariaDB.

mysql-test/t/mysqldump.test:
  Make test case work when build directory is not world readable
  (this is the case for Buildbot checkouts).
mysys/my_getopt.c:
  Restore bugfix which was lost in previous merge.
storage/xtradb/buf/buf0flu.c:
  Fix extranous line caused by bad merge.

mysql-test/t/mysqldump.test

@@ -1982,6 +1982,9 @@ drop table if exists `load`;
 create table `load` (a varchar(255));
 
 --copy_file std_data/words.dat $MYSQLTEST_VARDIR/tmp/load.txt
+# LOAD DATA requires the file to be world-readable. This may not be true
+# automatically, depending on how the build directory was created.
+--chmod 0644 $MYSQLTEST_VARDIR/tmp/load.txt
 
 --exec $MYSQL_IMPORT --ignore test $MYSQLTEST_VARDIR/tmp/load.txt
 

mysys/my_getopt.c

@@ -656,8 +656,9 @@ static int setval(const struct my_option *opts, uchar* *value, char *argument,
 	return EXIT_OUT_OF_MEMORY;
       break;
     case GET_ENUM:
-      if (((*(ulong *)result_pos)=
-	   find_type(argument, opts->typelib, 2) - 1) < 0)
+      pos= find_type(argument, opts->typelib, 2) - 1;
+      (*(ulong *)result_pos)= pos;
+      if (pos < 0)
       {
         /*
           Accept an integer representation of the enumerated item.

storage/xtradb/buf/buf0flu.c

@@ -1238,7 +1238,6 @@ buf_flush_LRU_recommendation(void)
 		   + BUF_FLUSH_EXTRA_MARGIN)
 	       && (distance < BUF_LRU_FREE_SEARCH_LEN)) {
 
-		mutex_t* block_mutex;
                 if (!bpage->in_LRU_list) {
 			/* reatart. but it is very optimistic */
 			bpage = UT_LIST_GET_LAST(buf_pool->LRU);