[PATCH] tests: Ensure loc_database_lookup finds a match

[Valters Jansons <valter.jansons@gmail.com>]

Commit 9e72b8a modified the lookup function to return 0 even if no
matches are found. As result, the test case could pass even if the
database lookup did not find any matches.

This commit restores the original intent of the test case, by adding
a failure condition when `network1` is NULL. This is similar to how
the subsequent test case was modified for the inverse condition.
---
I was checking https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1021952
and wondering why the "Could not look up 2001:db8::" issue would
suddenly disappear. This change popped up as a potential reason.
So I am expecting hppa builds will start failing intermittently again.

 src/test-network.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/test-network.c b/src/test-network.c
index 0cac1a4..73062f4 100644
--- a/src/test-network.c
+++ b/src/test-network.c
@@ -351,7 +351,7 @@ int main(int argc, char** argv) {
 
 	// Lookup an address in the subnet
 	err = loc_database_lookup_from_string(db, "2001:db8::", &network1);
-	if (err) {
+	if (err || !network1) {
 		fprintf(stderr, "Could not look up 2001:db8::\n");
 		exit(EXIT_FAILURE);
 	}
-- 
2.49.0