libdm: check version prints error

Move 'bad' label above log_error, so the
error message is printed on 'bad' path.
(And return 0 is not without log_error()).

libdm/ioctl/libdm-iface.c

@@ -544,10 +544,10 @@ int dm_check_version(void)
 
 	dm_get_library_version(libversion, sizeof(libversion));
 
+      bad:
 	log_error("Incompatible libdevmapper %s%s and kernel driver %s",
 		  libversion, compat, dmversion);
 
-      bad:
 	_version_ok = 0;
 	return 0;
 }