Fix for

Bug #1392 "On Win, slave leaves one temp file after successf. replicating LOAD DATA INFILE"
Windows-specific bug (we forgot to close a file before deleting it).
Patch written by me, tested by Miguel (thanks!) and it works.


sql/log.cc:
  changed the comment to mean the truth
sql/log_event.cc:
  When you finish replicating LOAD DATA INFILE, close the SQL_LOADxxx.data file
  before deleting it, or Windows will refuse to delete.
  No need to do the same thing for the SQL_LOADxxx.data file, it's not opened
  at this moment.

sql/log.cc

@@ -870,7 +870,7 @@ void MYSQL_LOG::new_file(bool need_lock)
   close(LOG_CLOSE_TO_BE_OPENED);
 
   /* 
-     Note that at this point, log_type == LOG_CLOSED (important for is_open()).
+     Note that at this point, log_type != LOG_CLOSED (important for is_open()).
   */
 
   open(old_name, save_log_type, new_name_ptr, index_file_name, io_cache_type,

sql/log_event.cc

@@ -2382,6 +2382,16 @@ int Execute_load_log_event::exec_event(struct st_relay_log_info* rli)
     }
     goto err;
   }
+  /*
+    We have an open file descriptor to the .info file; we need to close it
+    or Windows will refuse to delete the file in my_delete().
+  */
+  if (fd >= 0)
+  {
+    my_close(fd, MYF(0));
+    end_io_cache(&file);
+    fd= -1;
+  }
   (void) my_delete(fname, MYF(MY_WME));
   memcpy(p, ".data", 6);
   (void) my_delete(fname, MYF(MY_WME));