xdg-autostart-generator: make parameter const

src/xdg-autostart-generator/xdg-autostart-service.c

@@ -502,7 +502,7 @@ static int xdg_autostart_generate_desktop_condition(
 }
 
 int xdg_autostart_service_generate_unit(
-                XdgAutostartService *service,
+                const XdgAutostartService *service,
                 const char *dest) {
 
         _cleanup_free_ char *path_escaped = NULL, *exec_start = NULL, *unit = NULL;

src/xdg-autostart-generator/xdg-autostart-service.h

@@ -26,7 +26,6 @@ typedef struct XdgAutostartService {
 
 } XdgAutostartService;
 
-
 XdgAutostartService * xdg_autostart_service_free(XdgAutostartService *s);
 DEFINE_TRIVIAL_CLEANUP_FUNC(XdgAutostartService*, xdg_autostart_service_free);
 
@@ -34,4 +33,4 @@ char *xdg_autostart_service_translate_name(const char *name);
 int xdg_autostart_format_exec_start(const char *exec, char **ret_exec_start);
 
 XdgAutostartService *xdg_autostart_service_parse_desktop(const char *path);
-int xdg_autostart_service_generate_unit(XdgAutostartService *service, const char *dest);
+int xdg_autostart_service_generate_unit(const XdgAutostartService *service, const char *dest);