Check if wireguard_endpoint exists before checking if it is empty (#92)

templates/etc/wireguard/wg.conf.j2

@@ -71,10 +71,12 @@ Endpoint = {{hostvars[host].wireguard_endpoint}}:{{hostvars[host].wireguard_port
 {%       else %}
 Endpoint = {{host}}:{{hostvars[host].wireguard_port}}
 {%       endif %}
-{%     elif hostvars[host].wireguard_endpoint is defined and hostvars[host].wireguard_endpoint != "" %}
+{%     elif hostvars[host].wireguard_endpoint is defined %}
+{%       if hostvars[host].wireguard_endpoint != "" %}
 Endpoint = {{hostvars[host].wireguard_endpoint}}:{{wireguard_port}}
-{%     elif hostvars[host].wireguard_endpoint == "" %}
+{%       else %}
 # No endpoint defined for this peer
+{%       endif %}
 {%     else %}
 Endpoint = {{host}}:{{wireguard_port}}
 {%     endif %}