core: cast ignored retval of unit_realize_cgroup to void

src/core/dbus-mount.c

@@ -193,7 +193,7 @@ int bus_mount_set_property(
 int bus_mount_commit_properties(Unit *u) {
         assert(u);
 
-        unit_realize_cgroup(u);
+        (void) unit_realize_cgroup(u);
 
         return 0;
 }

src/core/dbus-scope.c

@@ -249,7 +249,7 @@ int bus_scope_set_property(
 int bus_scope_commit_properties(Unit *u) {
         assert(u);
 
-        unit_realize_cgroup(u);
+        (void) unit_realize_cgroup(u);
 
         return 0;
 }

src/core/dbus-service.c

@@ -785,7 +785,7 @@ int bus_service_set_property(
 int bus_service_commit_properties(Unit *u) {
         assert(u);
 
-        unit_realize_cgroup(u);
+        (void) unit_realize_cgroup(u);
 
         return 0;
 }

src/core/dbus-slice.c

@@ -28,7 +28,7 @@ int bus_slice_set_property(
 int bus_slice_commit_properties(Unit *u) {
         assert(u);
 
-        unit_realize_cgroup(u);
+        (void) unit_realize_cgroup(u);
 
         return 0;
 }

src/core/dbus-socket.c

@@ -468,7 +468,7 @@ int bus_socket_set_property(
 int bus_socket_commit_properties(Unit *u) {
         assert(u);
 
-        unit_realize_cgroup(u);
+        (void) unit_realize_cgroup(u);
 
         return 0;
 }

src/core/dbus-swap.c

@@ -49,7 +49,7 @@ int bus_swap_set_property(
 int bus_swap_commit_properties(Unit *u) {
         assert(u);
 
-        unit_realize_cgroup(u);
+        (void) unit_realize_cgroup(u);
 
         return 0;
 }