[win32] Fix minor problems with non USE_THREADS build. win32 branch

now looks 5.004_57-ready.

p4raw-id: //depot/win32/perl@456

1 files changed, 2 insertions, 0 deletions

diff --git a/thread.h b/thread.h
index 1b1ddf98be..07604f6bcc 100644
--- a/thread.h
+++ b/thread.h
@@ -217,6 +217,8 @@ typedef struct condpair {
 #define COND_BROADCAST(c)
 #define COND_WAIT(c, m)
 #define COND_DESTROY(c)
+#define LOCK_SV_MUTEX
+#define UNLOCK_SV_MUTEX
 
 #define THR
 /* Rats: if dTHR is just blank then the subsequent ";" throws an error */