Fixes to make code compile on Windows.

sql/sql_repl.cc:
  Adding cast to remove compile error on Windows platform.

sql/sql_repl.cc

@@ -1573,7 +1573,7 @@ int log_loaded_block(IO_CACHE* file)
   LOAD_FILE_INFO *lf_info;
   uint block_len;
   /* buffer contains position where we started last read */
-  char* buffer= my_b_get_buffer_start(file);
+  char* buffer= (char*) my_b_get_buffer_start(file);
   uint max_event_size= current_thd->variables.max_allowed_packet;
   lf_info= (LOAD_FILE_INFO*) file->arg;
   if (lf_info->last_pos_in_file != HA_POS_ERROR &&