talkd(8): use NULL for second gettimeofday(2) argument

[Scott Cheloha]

The timezone has no utility in this code.

ok to use NULL?

Index: table.c
===================================================================
RCS file: /cvs/src/libexec/talkd/table.c,v
retrieving revision 1.19
diff -u -p -r1.19 table.c
--- table.c     26 Aug 2016 08:44:04 -0000      1.19
+++ table.c     9 Aug 2019 21:28:02 -0000
@@ -52,7 +52,6 @@
 #define MAX_ID 16000   /* << 2^15 so I don't have sign troubles */
 
 struct timeval tp;
-struct timezone txp;
 
 typedef struct table_entry TABLE_ENTRY;
 
@@ -84,7 +83,7 @@ find_match(CTL_MSG *request)
        TABLE_ENTRY *ptr, *next;
        time_t current_time;
 
-       gettimeofday(&tp, &txp);
+       gettimeofday(&tp, NULL);
        current_time = tp.tv_sec;
        if (debug)
                print_request("find_match", request);
@@ -121,7 +120,7 @@ find_request(CTL_MSG *request)
        TABLE_ENTRY *ptr, *next;
        time_t current_time;
 
-       gettimeofday(&tp, &txp);
+       gettimeofday(&tp, NULL);
        current_time = tp.tv_sec;
        /*
         * See if this is a repeated message, and check for
@@ -161,7 +160,7 @@ insert_table(CTL_MSG *request, CTL_RESPO
 
        if (debug)
                print_request( "insert_table", request );
-       gettimeofday(&tp, &txp);
+       gettimeofday(&tp, NULL);
        current_time = tp.tv_sec;
        request->id_num = new_id();
        response->id_num = htonl(request->id_num);