Add missing header

cpp/lintian-ppa.cpp

@@ -14,6 +14,8 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 #include "common.h"
+#include "utilities.h"
+
 #include "launchpad.h"
 #include "distribution.h"
 #include "distro_series.h"
@@ -391,7 +393,8 @@ int main(int argc, char* argv[]) {
 
     auto ubuntu_opt = lp->distributions["ubuntu"];
     distribution ubuntu = ubuntu_opt.value();
-    distro_series current_series = ubuntu.current_series.value();
+    auto ds_opt = ubuntu.current_series;
+    distro_series current_series = ds_opt.value();
 
     // Retrieve user and PPA
     auto user_opt = lp->people[args.user];