tree-wide: port various places to use TAKE_PID()

src/shared/pager.c

@@ -286,7 +286,7 @@ void pager_close(void) {
         stdout_redirected = stderr_redirected = false;
 
         (void) kill(pager_pid, SIGCONT);
-        (void) wait_for_terminate(pager_pid, NULL);
+        (void) wait_for_terminate(TAKE_PID(pager_pid), NULL);
         pager_pid = 0;
 }
 

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

@@ -43,9 +43,7 @@ void ask_password_agent_close(void) {
                 return;
 
         /* Inform agent that we are done */
-        (void) kill_and_sigcont(agent_pid, SIGTERM);
-        (void) wait_for_terminate(agent_pid, NULL);
-        agent_pid = 0;
+        sigterm_wait(TAKE_PID(agent_pid));
 }
 
 int ask_password_agent_open_if_enabled(BusTransport transport, bool ask_password) {

src/shared/spawn-polkit-agent.c

@@ -69,9 +69,7 @@ void polkit_agent_close(void) {
                 return;
 
         /* Inform agent that we are done */
-        (void) kill_and_sigcont(agent_pid, SIGTERM);
-        (void) wait_for_terminate(agent_pid, NULL);
-        agent_pid = 0;
+        sigterm_wait(TAKE_PID(agent_pid));
 }
 
 #else