cleanup: Change datatype of usbdev->allow to boolean

src/conf/domain_conf.c

@@ -8679,9 +8679,9 @@ virDomainRedirFilterUsbDevDefParseXML(const xmlNodePtr node)
     allow = virXMLPropString(node, "allow");
     if (allow) {
         if (STREQ(allow, "yes"))
-            def->allow = 1;
+            def->allow = true;
         else if (STREQ(allow, "no"))
-            def->allow = 0;
+            def->allow = false;
         else {
             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                            _("Invalid allow value, either 'yes' or 'no'"));

src/conf/domain_conf.h

@@ -1440,7 +1440,7 @@ struct _virDomainRedirFilterUsbDevDef {
     int vendor;
     int product;
     int version;
-    unsigned int allow :1;
+    bool allow;
 };
 
 struct _virDomainRedirFilterDef {