fix gcc warnings about uninitialized variables

like:

src/shared/install.c: In function ‘unit_file_lookup_state’:
src/shared/install.c:1861:16: warning: ‘r’ may be used uninitialized in
this function [-Wmaybe-uninitialized]
         return r < 0 ? r : state;
                ^
src/shared/install.c:1796:13: note: ‘r’ was declared here
         int r;
             ^

2 files changed, 2 insertions, 2 deletions

diff --git a/src/resolve/resolved-dns-transaction.c b/src/resolve/resolved-dns-transaction.c
index 74b063414..bc1a90db1 100644
--- a/src/resolve/resolved-dns-transaction.c
+++ b/src/resolve/resolved-dns-transaction.c
@@ -252,7 +252,7 @@ static int dns_transaction_open_tcp(DnsTransaction *t) {
                         fd = dns_scope_tcp_socket(t->scope, t->received->family, &t->received->sender, t->received->sender_port);
                 else {
                         union in_addr_union address;
-                        int family;
+                        int family = AF_UNSPEC;
 
                         /* Otherwise, try to talk to the owner of a
                          * the IP address, in case this is a reverse
diff --git a/src/resolve/test-dns-domain.c b/src/resolve/test-dns-domain.c
index 2f3edaf78..c3208abc7 100644
--- a/src/resolve/test-dns-domain.c
+++ b/src/resolve/test-dns-domain.c
@@ -161,7 +161,7 @@ static void test_dns_name_single_label(void) {
 
 static void test_dns_name_reverse_one(const char *address, const char *name) {
         _cleanup_free_ char *p = NULL;
-        union in_addr_union a, b;
+        union in_addr_union a, b = {};
         int familya, familyb;
 
         assert_se(in_addr_from_string_auto(address, &familya, &a) >= 0);