opencvs: don't go on silently if snprintf() can't construct the tagpath

[Dawe]

As far as I understand the code there's no reason that opencvs should silently 
go on
if snprintf() can't construct the tagpath in cvs_parse_tagfile() and
cvs_write_tagfile().

Index: entries.c
===================================================================
RCS file: /cvs/src/usr.bin/cvs/entries.c,v
retrieving revision 1.102
diff -u -p -r1.102 entries.c
--- entries.c   19 Mar 2009 09:53:16 -0000      1.102
+++ entries.c   10 Jun 2010 11:55:44 -0000
@@ -419,7 +419,7 @@ void
 cvs_parse_tagfile(char *dir, char **tagp, char **datep, int *nbp)
 {
        FILE *fp;
-       int i, linenum;
+       int linenum;
        size_t len;
        struct tm datetm;
        char linebuf[128], tagpath[MAXPATHLEN];
@@ -435,9 +435,7 @@ cvs_parse_tagfile(char *dir, char **tagp
        if (nbp != NULL)
                *nbp = 0;
 
-       i = snprintf(tagpath, MAXPATHLEN, "%s/%s", dir, CVS_PATH_TAG);
-       if (i < 0 || i >= MAXPATHLEN)
-               return;
+       (void)xsnprintf(tagpath, MAXPATHLEN, "%s/%s", dir, CVS_PATH_TAG);
 
        if ((fp = fopen(tagpath, "r")) == NULL) {
                if (errno != ENOENT)
@@ -502,7 +500,6 @@ cvs_write_tagfile(const char *dir, char 
        char tagpath[MAXPATHLEN];
        char sticky[CVS_REV_BUFSZ];
        struct tm datetm;
-       int i;
 
        cvs_log(LP_TRACE, "cvs_write_tagfile(%s, %s, %s)", dir,
            tag != NULL ? tag : "", date != NULL ? date : "");
@@ -510,9 +507,7 @@ cvs_write_tagfile(const char *dir, char 
        if (cvs_noexec == 1)
                return;
 
-       i = snprintf(tagpath, MAXPATHLEN, "%s/%s", dir, CVS_PATH_TAG);
-       if (i < 0 || i >= MAXPATHLEN)
-               return;
+       (void)xsnprintf(tagpath, MAXPATHLEN, "%s/%s", dir, CVS_PATH_TAG);
 
        if (tag != NULL || cvs_specified_date != -1 ||
            cvs_directory_date != -1) {