configure: detect clockid_t properly.

* configure: test for clockid_t type refers to
CLOCK_REALTIME macro also, which comes from <time.h>.
But that header isn't included. Since we only care
about whether or not we have the type, for the sake of
defining it in FFI, and don't use the CLOCK_REALTIME
macro anywhere, let's replace it with a 0 constant.

1 files changed, 1 insertions, 1 deletions

diff --git a/configure b/configure
index a441a7c4..93c9132e 100755
--- a/configure
+++ b/configure
@@ -2868,7 +2868,7 @@ cat > conftest.c <<!
 
 int main(void)
 {
-  clockid_t cid = CLOCK_REALTIME;
+  clockid_t cid = 0;
   return 0;
 }
 !