Code cleanups during code reviews

Ensure we get error if INSERT IGNORE ... SELECT fails
Fixed wrong key_part->key_length usage in index_merge


client/mysql.cc:
  Code cleanups & simply optimizations
mysql-test/r/information_schema.result:
  Safety
mysql-test/t/information_schema.test:
  Safety
sql/ha_ndbcluster.cc:
  Code cleanups
sql/item.cc:
  Code cleanups
sql/item_subselect.cc:
  Code cleanups
sql/item_sum.cc:
  Code cleanups
sql/opt_range.cc:
  Made get_index_only_read_time() static (instad of inline) to increase portability (function was not declared before use)
  Simple optimization
  Fixed wrong key_part->key_length usage in index_merge
  Removed not used variable n_used_covered
  Indentation fixes & comment cleanups
sql/parse_file.cc:
  Code cleanups
sql/sql_base.cc:
  Code cleanups
sql/sql_bitmap.h:
  Added missing return
sql/sql_insert.cc:
  Ensure we get error if INSERT IGNORE ... SELECT fails
sql/sql_select.cc:
  Code cleanups
sql/sql_show.cc:
  Safety fix if a LOT of errors are ignored
sql/sql_update.cc:
  Code cleanups
sql/table.cc:
  Code cleanups
sql/table.h:
  Code cleanups
sql/uniques.cc:
  Code cleanups
strings/decimal.c:
  Simple optimization
  Code cleanups

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/sql_bitmap.h b/sql/sql_bitmap.h
index 2fd603d9381..d8e93f1fd14 100644
--- a/sql/sql_bitmap.h
+++ b/sql/sql_bitmap.h
@@ -82,7 +82,7 @@ public:
     if (sizeof(buffer) >= 8)
       return uint8korr(buffer);
     DBUG_ASSERT(sizeof(buffer) >= 4);
-    uint4korr(buffer);
+    return (ulonglong) uint4korr(buffer);
   }
 };