fix: make sure only positive integers can be used for full-inventory-postpone option

Author: g-bougard

Diff for: lib/GLPI/Agent/Inventory.pm

@@ -508,7 +508,8 @@ sub computeChecksum {
 
     # Prepare to postpone full inventory when required
     my $postpone = 0;
-    $postpone = (($last_state->get('_postpone_count') // 0) + 1) % ($postpone_config+1)
+    my $current_count = $last_state->get('_postpone_count') // '0';
+    $postpone = ($current_count =~ /^\d+$/ ? int($current_count)+1 : 1) % ($postpone_config+1)
         if $postpone_config;
 
     # Always disable postpone if format is not json

Diff for: lib/GLPI/Agent/Task/Inventory.pm

@@ -564,7 +564,7 @@ sub _feedInventory {
         if $versionprovider;
 
     # Don't compute checksum on partial inventory or with glpi-inventory script
-    $self->{inventory}->computeChecksum($self->{config}->{'full-inventory-postpone'})
+    $self->{inventory}->computeChecksum($self->{config}->{'full-inventory-postpone'} =~ /^\d+$/ ? int($self->{config}->{'full-inventory-postpone'}) : 0)
         unless $self->{partial} || $self->{nochecksum};
 }