util/u_thread.h: Include stdint.h for int64_t definition.

Fixes MinGW build.  Trivial.

diff --git a/src/util/u_thread.h b/src/util/u_thread.h
index 7411140..8eab3a5 100644 (file)
--- a/src/util/u_thread.h
+++ b/src/util/u_thread.h
@@ -27,6 +27,8 @@
 #ifndef U_THREAD_H_
 #define U_THREAD_H_
 
+#include <stdint.h>
+
 #include "c11/threads.h"
 
 #ifdef HAVE_PTHREAD