libdm-config: replace check for 0

No need to call strlen() when checking for zero length string.

diff --git a/device_mapper/libdm-config.c b/device_mapper/libdm-config.c
index 7ce5620c623ebc1d6c3849fdaaf74990b69ef104..a4c79c20dec2f846abcbd9cf3b75c85ea842ba73 100644 (file)
--- a/device_mapper/libdm-config.c
+++ b/device_mapper/libdm-config.c
@@ -599,7 +599,7 @@ static struct dm_config_node *_section(struct parser *p, struct dm_config_node *
                match(TOK_IDENTIFIER);
        }
 
-       if (!strlen(str)) {
+       if (!*str) {
                log_error("Parse error at byte %" PRIptrdiff_t " (line %d): empty section identifier",
                          p->tb - p->fb + 1, p->line);
                return NULL;