shared: explicitly ignore the return value of wait_for_terminate

CID#1237532
CID#1237523
CID#1237522

src/shared/pager.c

@@ -143,7 +143,7 @@ void pager_close(void) {
         /* Inform pager that we are done */
         fclose(stdout);
         kill(pager_pid, SIGCONT);
-        wait_for_terminate(pager_pid, NULL);
+        (void) wait_for_terminate(pager_pid, NULL);
         pager_pid = 0;
 }
 

src/shared/spawn-ask-password-agent.c

@@ -62,6 +62,6 @@ void ask_password_agent_close(void) {
         /* Inform agent that we are done */
         kill(agent_pid, SIGTERM);
         kill(agent_pid, SIGCONT);
-        wait_for_terminate(agent_pid, NULL);
+        (void) wait_for_terminate(agent_pid, NULL);
         agent_pid = 0;
 }

src/shared/spawn-polkit-agent.c

@@ -82,7 +82,7 @@ void polkit_agent_close(void) {
         /* Inform agent that we are done */
         kill(agent_pid, SIGTERM);
         kill(agent_pid, SIGCONT);
-        wait_for_terminate(agent_pid, NULL);
+        (void) wait_for_terminate(agent_pid, NULL);
         agent_pid = 0;
 }