fix: Don't process results if scan report is empty

!1

playbooks/tasks/scan_subnet.yaml

@@ -28,7 +28,7 @@
   ansible.builtin.set_fact:
     subnet_scan_results: |-
       [
-      {% for scanned_host in ((nmap_scan.stdout | ansible.utils.from_xml) | from_yaml).nmaprun.host %}
+      {% for scanned_host in ((nmap_scan.stdout | ansible.utils.from_xml) | from_yaml).nmaprun.host | default([]) %}
         {% if
           scanned_host.address[0]['@addrtype'] | default('') == 'ipv4'
             or

playbooks/tasks/server/subnet_scan.yaml

@@ -29,7 +29,7 @@
 - name: Update IP Addresses
   ansible.builtin.include_tasks:
     file: tasks/server/ipaddress.yaml
-  loop: "{{ mysql_query_find_ipaddress.results }}"
+  loop: "{{ mysql_query_find_ipaddress.results | default([]) }}"
   loop_control:
     loop_var: scan_address
     label: "{{ scan_address }}"