Fixed compiler warnings detected by option -Wshadow and -Wunused:

- Removed not used variables and functions
- Added #ifdef around code that is not used
- Renamed variables and functions to avoid conflicts
- Removed some not used arguments

Fixed some class/struct warnings in ndb
Added define IS_LONGDATA() to simplify code in libmysql.c

I did run gcov on the changes and added 'purecov' comments on almost all lines that was not just variable name changes

1 files changed, 2 insertions, 2 deletions

diff --git a/sql/tztime.cc b/sql/tztime.cc
index 4becf4a9fcc..27946d8c306 100644
--- a/sql/tztime.cc
+++ b/sql/tztime.cc
@@ -1756,8 +1756,8 @@ end_with_setting_default_tz:
   /* If we have default time zone try to load it */
   if (default_tzname)
   {
-    String tmp_tzname(default_tzname, &my_charset_latin1);
-    if (!(global_system_variables.time_zone= my_tz_find(&tmp_tzname, tables)))
+    String tmp_tzname2(default_tzname, &my_charset_latin1);
+    if (!(global_system_variables.time_zone= my_tz_find(&tmp_tzname2, tables)))
     {
       sql_print_error("Fatal error: Illegal or unknown default time zone '%s'",
                       default_tzname);