* ospfd.h: Include log.h, fixes compile with gcc-4.0.

	[backport candidate]
diff --git a/ospfd/ospfd.h b/ospfd/ospfd.h
index 2a6c23e..a148695 100644
--- a/ospfd/ospfd.h
+++ b/ospfd/ospfd.h
@@ -24,6 +24,7 @@
 #define _ZEBRA_OSPFD_H
 
 #include "filter.h"
+#include "log.h"
 
 #define OSPF_VERSION            2