Update VC++ files

Portability fixes
After merge fixes


VC++Files/mysql.dsw:
  Added dependencys
VC++Files/mysys/mysys.dsp:
  Add missing files
client/mysqlcheck.c:
  Added comment
client/mysqltest.c:
  Remove not used variables
include/keycache.h:
  Removed not used element
include/m_ctype.h:
  Portability fix
include/my_base.h:
  Removed not used define
myisam/mi_keycache.c:
  Added mutex for extra safety
mysql-test/r/count_distinct3.result:
  Faster test
mysql-test/r/rpl_change_master.result:
  updated results
mysql-test/t/count_distinct3.test:
  Faster test
mysql-test/t/rpl_change_master.test:
  Make test repeatable
mysys/default.c:
  Remove compiler warning
mysys/mf_keycache.c:
  Removed not used 'action' element
mysys/my_getopt.c:
  Remove not used variable
sql/ha_myisam.cc:
  Remove compiler warning
sql/item.cc:
  Fixed wrong patch from last changeset
sql/item_timefunc.cc:
  Remove compiler warnings
sql/set_var.cc:
  Remove compiler warnings
sql/sql_prepare.cc:
  Remove not used variables
sql/sql_repl.cc:
  After merge fix
sql/sql_select.h:
  Added comments
sql/sql_table.cc:
  Remove not used define
strings/ctype-tis620.c:
  Remove not used variables

sql/set_var.cc

@@ -1884,7 +1884,7 @@ end:
 
 bool sys_var_key_cache_long::update(THD *thd, set_var *var)
 {
-  ulong tmp= var->value->val_int();
+  ulong tmp= (ulong) var->value->val_int();
   LEX_STRING *base_name= &var->base;
   bool error= 0;