exit-status: add missing include for SIG* defines

Otherwise building fails with glibc 2.16. It works with glibc >= 2.17
because it is implicitly included via macro.h -> sys/param.h -> signal.h

diff --git a/src/basic/exit-status.c b/src/basic/exit-status.c
index c09efdd2cb79c1643aed2c8042e3f90f361d8f07..5ab36825c0c62eb55b3b71274d907fe5e2602c7e 100644 (file)
--- a/src/basic/exit-status.c
+++ b/src/basic/exit-status.c
@@ -20,6 +20,7 @@
 ***/
 
 #include <stdlib.h>
+#include <signal.h>
 
 #include "exit-status.h"
 #include "set.h"