misc: avoid some dead initialization warnings

Clang analyzer warnings:

Dead store, Dead initialization:

    lib/mbsedit.c:154:8: warning: Value stored to 'in' during its initialization is never read
            char *in = (char *) &c;
                  ^~   ~~~~~~~~~~~

    misc-utils/findmnt-verify.c:129:14: warning: Value stored to 'cn' during its initialization is never read
            const char *cn = tgt;
                        ^~   ~~~
Dead store, Dead increment:

    sys-utils/hwclock.c:1461:2: warning: Value stored to 'argv' is never read
            argv += optind;
            ^       ~~~~~~

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>

lib/mbsedit.c

@@ -151,7 +151,7 @@ static size_t mbs_insert(char *str, wint_t c, size_t *ncells)
 {
 	/* all in bytes! */
 	size_t n = 1, bytes;
-	char *in = (char *) &c;
+	char *in;
 
 #ifdef HAVE_WIDECHAR
 	wchar_t wc = (wchar_t) c;
@@ -162,6 +162,7 @@ static size_t mbs_insert(char *str, wint_t c, size_t *ncells)
 	in = in_buf;
 #else
 	*ncells = 1;
+	in = (char *) &c;
 #endif
 	bytes       = strlen(str);
 

misc-utils/findmnt-verify.c

@@ -126,14 +126,13 @@ done:
 static int verify_target(struct verify_context *vfy)
 {
 	const char *tgt = mnt_fs_get_target(vfy->fs);
-	const char *cn = tgt;
 	struct stat sb;
 
 	if (!tgt)
 		return verify_err(vfy, _("undefined target (fs_file)"));
 
 	if (!(flags & FL_NOCACHE)) {
-		cn = mnt_resolve_target(tgt, cache);
+		const char *cn = mnt_resolve_target(tgt, cache);
 		if (!cn)
 			return -ENOMEM;
 		if (strcmp(cn, tgt) != 0)

sys-utils/hwclock.c

@@ -1457,10 +1457,7 @@ int main(int argc, char **argv)
 		}
 	}
 
-	argc -= optind;
-	argv += optind;
-
-	if (argc > 0) {
+	if (argc > optind) {
 		warnx(_("%d too many arguments given"), argc);
 		errtryhelp(EXIT_FAILURE);
 	}