dio functions and types now have no leading _ anymore

git-svn-id: svn://svn.cc65.org/cc65/trunk@435 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/atari/siocall.s

@@ -6,12 +6,12 @@
 ; generic (e.g. transfer size is fixed), it's used
 ; to save space with _dio_read and _dio_write functions.
 ;
-; unsigned char __fastcall__ _sio_call(_dhandle_t handle,
-;				       _sectnum_t sect_num,
+; unsigned char __fastcall__ _sio_call(dhandle_t handle,
+;				       sectnum_t sect_num,
 ;				       void *buffer,
 ;				       unsigned int sio_val);
-; _dhandle_t - 16bit (ptr)
-; _sectnum_t - 16bit
+; dhandle_t - 16bit (ptr)
+; sectnum_t - 16bit
 ; sio_val is (sio_command | sio_direction << 8)
 ;