scons: Build roundevent_test.

Reviewed-by: Roland Scheidegger <sroland@vmware.co>

src/util/SConscript

@@ -54,3 +54,10 @@ u_atomic_test = env.Program(
 )
 alias = env.Alias("u_atomic_test", u_atomic_test, u_atomic_test[0].abspath)
 AlwaysBuild(alias)
+
+roundeven_test = env.Program(
+    target = 'roundeven_test',
+    source = ['roundeven_test.c'],
+)
+alias = env.Alias("roundeven_test", roundeven_test, roundeven_test[0].abspath)
+AlwaysBuild(alias)

src/util/rounding.h

@@ -24,6 +24,8 @@
 #ifndef _ROUNDING_H
 #define _ROUNDING_H
 
+#include "c99_compat.h" // inline
+
 #include <math.h>
 #include <limits.h>