Fixed portability issue in my_thr_init.c (was added in my last push)

Fixed compiler warnings (detected by VC++):
- Removed not used variables
- Added casts
- Fixed wrong assignments to bool
- Fixed wrong calls with bool arguments
- Added missing argument to store(longlong), which caused wrong store method to be called.



client/mysqldump.c:
  Removed compiler warning
heap/hp_clear.c:
  Removed compiler warning
include/my_global.h:
  Removed compiler warning
include/my_tree.h:
  Changed memory limits from int to ulong
  (Allowed me to get rid of some compiler warnings)
myisam/mi_create.c:
  Removed compiler warning
myisam/myisampack.c:
  Removed compiler warning
mysys/base64.c:
  Removed compiler warning
mysys/my_thr_init.c:
  Fixed portability issue (detected on windows)
  Added DBUG_ASSERT to detect if we call my_thread_end() too many times
  Don't wait if THR_thread_count == -1 (error condition)
mysys/tree.c:
  Removed compiler warning
sql/field.cc:
  Removed compiler warning
  Fixed wrong parameter to check_date()
  Added missing argument to store(longlong)
sql/ha_archive.cc:
  Removed compiler warning
sql/ha_federated.cc:
  Removed compiler warning
sql/ha_innodb.cc:
  Removed not used variable
sql/handler.cc:
  Removed not used variable
  Fixed wrong if (we didn't detect if rollback or commit failed). Not critical as value is not yet used
sql/item.cc:
  Removed compiler warning
sql/item_func.cc:
  Removed compiler warning
sql/item_strfunc.cc:
  Removed compiler warning
sql/item_timefunc.cc:
  Removed compiler warning
sql/log.cc:
  Removed compiler warning
sql/mysql_priv.h:
  Removed compiler warning
sql/opt_range.cc:
  Removed compiler warning
sql/password.c:
  Removed compiler warning
sql/set_var.cc:
  Removed compiler warning
sql/slave.cc:
  Removed compiler warning
sql/sp.cc:
  Removed compiler warning
sql/sp_cache.cc:
  Removed compiler warning
sql/sp_head.cc:
  Removed compiler warning
  Adjusted argument to reserve() to not use up too much memory that we are probably not going to need
sql/sql_acl.cc:
  Added missing argument to store(longlong)
sql/sql_base.cc:
  Removed compiler warning
sql/sql_db.cc:
  Removed compiler warning
sql/sql_delete.cc:
  Removed compiler warning
sql/sql_handler.cc:
  Removed not used variable
sql/sql_lex.h:
  Removed not used variable
sql/sql_prepare.cc:
  Removed not used variable
sql/sql_rename.cc:
  Removed not used variable
sql/sql_select.cc:
  Fixed that select_options are not 'cut'
  Removed some not used variables
  Removed compiler warnings by adding cast
sql/sql_show.cc:
  Removed not used variables
  Added missing argument to store(longlong)
  Removed compiler warnings
sql/sql_trigger.cc:
  Removed not used variables
  Added cast to remove compiler warnings
sql/sql_update.cc:
  Fixed wrong set of bool variable
sql/sql_view.cc:
  Removed not used variables
  Added cast to get rid of compiler warnings
sql-common/client.c:
  Fixed compiler warning
sql-common/my_time.c:
  Fixed wrong argument to check_date()
  Added casts to get rid of compiler warnings
sql/sql_yacc.yy:
  Removed not used variable
sql/uniques.cc:
  Changes memory size from uint to ulong
  Added casts to get rid of compiler warnings
strings/ctype-simple.c:
  Fixed cast to get rid of compiler warnings

sql/opt_range.cc

@@ -1924,7 +1924,7 @@ int SQL_SELECT::test_quick_select(THD *thd, key_map keys_to_use,
 	key_parts->null_bit=	 key_part_info->null_bit;
         key_parts->image_type =
           (key_info->flags & HA_SPATIAL) ? Field::itMBR : Field::itRAW;
-        key_parts->flag=         key_part_info->key_part_flag;
+        key_parts->flag=         (uint8) key_part_info->key_part_flag;
       }
       param.real_keynr[param.keys++]=idx;
     }
@@ -6240,7 +6240,7 @@ QUICK_RANGE_SELECT *get_quick_select_for_ref(THD *thd, TABLE *table,
     key_part->length=  	    key_info->key_part[part].length;
     key_part->store_length= key_info->key_part[part].store_length;
     key_part->null_bit=     key_info->key_part[part].null_bit;
-    key_part->flag=         key_info->key_part[part].key_part_flag;
+    key_part->flag=         (uint8) key_info->key_part[part].key_part_flag;
   }
   if (insert_dynamic(&quick->ranges,(gptr)&range))
     goto err;