static windows build compatibility

diff --git a/lib/sfio/vthread.h b/lib/sfio/vthread.h
index 1f56828b73a8401f5f1eba72edfbe57496b93e9d..0f19fca4a410c96429951ff083a3c464f85f62ef 100644 (file)
--- a/lib/sfio/vthread.h
+++ b/lib/sfio/vthread.h
@@ -45,6 +45,7 @@ extern "C" {
 #endif
 #undef vt_threaded
 
+
 #if _may_use_threads && !defined(vt_threaded) && _hdr_pthread
 #define vt_threaded            1
 #include                       <pthread.h>