[Buildroot] [PATCH] core/pkg-infra: don't display "foo Downloading" when there's no source

[Yann E. MORIN]

Commit ea55e1323 (core/pkg-infra: don't enforce site-method for extra
downloads) forgot to account for those packages that have nothing to
download, like the skeleton, or like virtual packages...

The side effect is that the message "foo Downloading" is thus
displayed when it should not be.

Fix that.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
---
 package/pkg-generic.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk
index a6e6e2b22c..aa638a4b04 100644
--- a/package/pkg-generic.mk
+++ b/package/pkg-generic.mk
@@ -498,7 +498,7 @@ BR_NO_CHECK_HASH_FOR += $$($(2)_SOURCE)
 endif
 
 $(2)_ALL_DOWNLOADS = \
-	$$($(2)_SITE_METHOD)+$$($(2)_SITE)/$$($(2)_SOURCE) \
+	$$(if $$($(2)_SOURCE),$$($(2)_SITE_METHOD)+$$($(2)_SITE)/$$($(2)_SOURCE)) \
 	$$(foreach p,$$($(2)_PATCH) $$($(2)_EXTRA_DOWNLOADS),\
 		$$(if $$(findstring ://,$$(p)),$$(p),\
 			$$($(2)_SITE)/$$(p)))
-- 
2.14.1