tdb tools need #include <signal.h>

Jeremy.

source/tdb/spinlock.c

@@ -30,6 +30,7 @@
 #include <errno.h>
 #include <sys/stat.h>
 #include <time.h>
+#include <signal.h>
 #include "tdb.h"
 #include "spinlock.h"
 

source/tdb/tdbtest.c

@@ -8,6 +8,7 @@
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#include <signal.h>
 #include "tdb.h"
 #include <gdbm.h>
 

source/tdb/tdbtool.c

@@ -33,6 +33,7 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <ctype.h>
+#include <signal.h>
 #include "tdb.h"
 
 /* a tdb tool for manipulating a tdb database */