make it work with less variables set in the playbook

defaults/main.yaml

@@ -51,7 +51,6 @@ file_browser_command: thunar
 calculator_command: "{{default_browser}} --new-window https://www.geogebra.org/calculator"
 mail_command: thunderbird
 
-background_image: false
 home_copy_all_background_images: false
 
 home_autostart_terminal: true
@@ -61,3 +60,5 @@ home_autostart_pasystray: "{{ home_profile != 'vdesk' }}"
 home_autostart_unclutter: "{{ home_profile == 'presentation' }}"
 
 default_activities: []
+
+workspaces: {}

tasks/git.yaml

@@ -4,3 +4,5 @@
   template:
     src: git/gitconfig.j2
     dest: ~/.gitconfig
+  when:
+    - git_user_email is defined