isisd: change ISIS_METHOD to use C preprocessor
this fixes warnings from vtysh extract.pl by making sure the isis method
files always 'work'. (previously, extract.pl would grab unselected isis
method sources and then complain about missing headers)
diff --git a/isisd/isis_dlpi.c b/isisd/isis_dlpi.c
index 3cbe0b4..fe872a9 100644
--- a/isisd/isis_dlpi.c
+++ b/isisd/isis_dlpi.c
@@ -21,6 +21,7 @@
*/
#include <zebra.h>
+#if ISIS_METHOD == ISIS_METHOD_DLPI
#include <net/if.h>
#include <netinet/if_ether.h>
#include <sys/types.h>
@@ -622,3 +623,5 @@
sock_buff, stream_get_endp (circuit->snd_stream) + LLC_LEN, 0);
return ISIS_OK;
}
+
+#endif /* ISIS_METHOD == ISIS_METHOD_DLPI */