Fix LazyAND condition failing when nested condition returns a string

As shown by the CheckReturn condition, conditions can return any value
that is interpreted as true or false, not just zero or one (or even a
number).

Since the result is used to check that more than a single condition was
evaluated, there's no need to use the condition result.

lib/Workflow/Condition/LazyAND.pm

@@ -40,7 +40,7 @@ sub evaluate {
         if ( not $result ) {
             condition_error("Condition '$cond' returned 'false'");
         }
-        $total += $result;
+        $total++;
     }
 
     return $total