Use HAVE___INT64

[Richard Kenner]

I notice autoconf now checks for this, so we might as well use it.
Tested by compilation only.

Sun Dec  9 20:25:17 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>

	* hwint.h (HOST_BITS_PER_LONGLONG): Deal with __int64 type.
	* vmsdbg.h (DST_SRC_COMMAND): Test for type of long long or __int64,
	not GNUC.

*** hwint.h	2001/10/09 22:40:12	1.10
--- hwint.h	2001/12/10 01:29:58
***************
*** 19,22 ****
--- 19,25 ----
  # define HOST_BITS_PER_LONGLONG (CHAR_BIT * SIZEOF_LONG_LONG)
  #else
+ #ifdef HAVE__INT64
+ # define HOST_BITS_PER_LONGLONG (CHAR_BIT * SIZEOF___INT64)
+ #else
  /* If we're here and we're GCC, assume this is stage 2+ of a bootstrap
     and 'long long' has the width of the *target*'s long long.  */
***************
*** 24,27 ****
--- 27,31 ----
  #  define HOST_BITS_PER_LONGLONG LONG_LONG_TYPE_SIZE
  # endif /* gcc */
+ #endif
  #endif /* no long long */
  
*** vmsdbg.h	2001/12/09 15:57:48	1.3
--- vmsdbg.h	2001/12/10 01:29:58
*************** typedef struct _DST_SRC_COMMAND
*** 217,224 ****
  	  unsigned char dst_b_src_df_flags;
  	  unsigned short int dst_w_src_df_fileid;
! #ifdef __GNUC__
  	  long long dst_q_src_df_rms_cdt;
  #else
  	  __int64 dst_q_src_df_rms_cdt;
  #endif
  	  unsigned int dst_l_src_df_rms_ebk;
--- 217,226 ----
  	  unsigned char dst_b_src_df_flags;
  	  unsigned short int dst_w_src_df_fileid;
! #ifdef HAVE_LONG_LONG
  	  long long dst_q_src_df_rms_cdt;
  #else
+ #ifdef HAVE___INT64
  	  __int64 dst_q_src_df_rms_cdt;
+ #endif
  #endif
  	  unsigned int dst_l_src_df_rms_ebk;