Put a memset in ast_localtime() instead of a couple places in app_voicemail

to prevent the problem everywhere instead of just a couple of places.
(related to issue #10746)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@82676 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -1783,8 +1783,6 @@ static void make_email_file(FILE *p, char *srcemail, struct ast_vm_user *vmu, in
 #define ENDL "\n"
 #endif
 
-	memset(&tm, 0, sizeof(tm));
-
 	gethostname(host, sizeof(host) - 1);
 	if (strchr(srcemail, '@'))
 		ast_copy_string(who, srcemail, sizeof(who));
@@ -2053,7 +2051,6 @@ static int get_date(char *s, int len)
 	time_t t;
 
 	time(&t);
-	memset(&tm, 0, sizeof(tm));
 
 	ast_localtime(&t, &tm, NULL);
 

main/stdtime/localtime.c

@@ -1142,6 +1142,7 @@ static struct tm *localsub(const time_t *timep, const long offset, struct tm *tm
 struct tm *ast_localtime(const time_t *timep, struct tm *tmp, const char *zone)
 {
 	const struct state *sp = ast_tzset(zone);
+	memset(tmp, 0, sizeof(*tmp));
 	return sp ? localsub(timep, 0L, tmp, sp) : NULL;
 }