network: Use consistent naming in bridge_driver for virNetwork objects

Use @obj for a virNetworkObjPtr

Use @net for a virNetworkPtr
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/network/bridge_driver.h

@@ -60,7 +60,7 @@ networkGetActualType(virDomainNetDefPtr iface)
     ATTRIBUTE_NONNULL(1);
 
 int
-networkDnsmasqConfContents(virNetworkObjPtr network,
+networkDnsmasqConfContents(virNetworkObjPtr obj,
                            const char *pidfile,
                            char **configstr,
                            dnsmasqContext *dctx,