vici: Fix clean-local target for Perl bindings if they were not built

This is called when running `make distclean` (or indirectly via `make
distcheck`).

diff --git a/src/libcharon/plugins/vici/perl/Makefile.am b/src/libcharon/plugins/vici/perl/Makefile.am
index 1c2d86e..9bc6262 100644 (file)
--- a/src/libcharon/plugins/vici/perl/Makefile.am
+++ b/src/libcharon/plugins/vici/perl/Makefile.am
@@ -18,7 +18,7 @@ Vici-Session/pm_to_blib: $(EXTRA_DIST) $(srcdir)/Vici-Session/Makefile
        (cd $(srcdir)/Vici-Session; make)
 
 clean-local:
-       (cd $(srcdir)/Vici-Session; make clean)
+       (cd $(srcdir)/Vici-Session; [ ! -f Makefile ] || make clean)
 
 if PERL_CPAN_INSTALL
 install-exec-local: Vici-Session/pm_to_blib