bhyvexml2argvmock: change int to size_t for tapfdSize

Commit c5b6a4a5 forget to update also this mock function.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

tests/bhyvexml2argvmock.c

@@ -24,7 +24,7 @@ int virNetDevTapCreateInBridgePort(const char *brname ATTRIBUTE_UNUSED,
                                    const unsigned char *vmuuid ATTRIBUTE_UNUSED,
                                    const char *tunpath ATTRIBUTE_UNUSED,
                                    int *tapfd ATTRIBUTE_UNUSED,
-                                   int tapfdSize ATTRIBUTE_UNUSED,
+                                   size_t tapfdSize ATTRIBUTE_UNUSED,
                                    virNetDevVPortProfilePtr virtPortProfile ATTRIBUTE_UNUSED,
                                    virNetDevVlanPtr virtVlan ATTRIBUTE_UNUSED,
                                    unsigned int fakeflags ATTRIBUTE_UNUSED)