Fix #1435: mas : Fix "invalid literal" when no app (#1436)

* Fix #1435: mas : Fix "invalid literal" when no app

* Add changelog fragment

* Update changelogs/fragments/1436-mas-fix-no-app-installed.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/1436-mas-fix-no-app-installed.yml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - "mas - fix ``invalid literal`` when no app can be found (https://github.com/ansible-collections/community.general/pull/1436)."

plugins/modules/packaging/os/mas.py

@@ -183,6 +183,8 @@ class Mas(object):
 
         rc, raw_apps, err = self.run([command])
         rows = raw_apps.split("\n")
+        if rows[0] == "No installed apps found":
+            rows = []
         apps = []
         for r in rows:
             # Format: "123456789 App Name"