*: make sure zebra.h is always included first

zebra.h pulls in config.h, which results in fiddling with things like
__FILE_OFFSET_BITS. It must always be included first, in order to set
flags that influence the compiler via <features.h>.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/isisd/topology/random.c b/isisd/topology/random.c
index c49c082..2c457c5 100644
--- a/isisd/topology/random.c
+++ b/isisd/topology/random.c
@@ -7,6 +7,7 @@
 /*                                                                   */
 /*********************************************************************/
 
+#include <zebra.h>
 #include <sys/types.h>
 #include <sys/times.h>
 
diff --git a/isisd/topology/spacyc.c b/isisd/topology/spacyc.c
index 8531447..91a4799 100644
--- a/isisd/topology/spacyc.c
+++ b/isisd/topology/spacyc.c
@@ -1,3 +1,4 @@
+#include <zebra.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/isisd/topology/spgrid.c b/isisd/topology/spgrid.c
index 40147fb..22cfa7b 100644
--- a/isisd/topology/spgrid.c
+++ b/isisd/topology/spgrid.c
@@ -1,11 +1,11 @@
+#include <zebra.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "random.c"
 
-#include <zebra.h>
-
 #include "thread.h"
 #include "vty.h"
 #include "log.h"
diff --git a/isisd/topology/sprand.c b/isisd/topology/sprand.c
index 28b58b3..1c1eb19 100644
--- a/isisd/topology/sprand.c
+++ b/isisd/topology/sprand.c
@@ -1,3 +1,5 @@
+#include <zebra.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>