Fix compilation warnings due to prototype of thread_select

* src/thread.h <int select_func>: Make the 5th and 6th arguments
be 'const'.
* src/process.c [WINDOWSNT]:
* src/w32proc.c: Make the 5th and 6th argument to sys_select be
'const'.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/w32.c b/src/w32.c
index 7a80275a7c8..c6fc7ef8567 100644
--- a/src/w32.c
+++ b/src/w32.c
@@ -272,7 +272,7 @@ static BOOL WINAPI revert_to_self (void);
 static int sys_access (const char *, int);
 extern void *e_malloc (size_t);
 extern int sys_select (int, SELECT_TYPE *, SELECT_TYPE *, SELECT_TYPE *,
-                       struct timespec *, sigset_t *);
+                       const struct timespec *, const sigset_t *);
 extern int sys_dup (int);