Fix compilation with clang.

diff --git a/common/os_thread.hpp b/common/os_thread.hpp
index bf4c8eaac5e99dd08bde3ef17670cefdfc605911..3aeeee4849551e360bcc4db44335e9251603d415 100644 (file)
--- a/common/os_thread.hpp
+++ b/common/os_thread.hpp
@@ -324,7 +324,7 @@ private:
 #endif
 
         template< class Function, class Arg >
-        explicit thread( Function& f, Arg & arg ) {
+        explicit thread( Function& f, Arg arg ) {
 #ifdef _WIN32
             /* FIXME */
             DWORD id = 0;