VC++Files/libmysqld/libmysqld.dsp:
  added sql/my_decimal.cc
VC++Files/sql/mysqld.dsp:
  added my_decimal.cpp
VC++Files/strings/strings.dsp:
  added decimal.c
sql/field.cc:
  conversion fixes for windows compilation
sql/item.h:
  fix for windows compilation
sql/item_func.cc:
  fixed conversion for windows (cast from ulonglong to double 
  is not supported)
sql/item_sum.cc:
  typecast fix for windows compilation
sql/sp_head.cc:
  typecast fix fo windows compilation
sql/sql_cache.cc:
  typecast fix for windows compilation