two fixlets for -Wall

diff --git a/networking/interface.c b/networking/interface.c
index dff6add..abd58b5 100644
--- a/networking/interface.c
+++ b/networking/interface.c
@@ -1224,7 +1224,7 @@
     unsigned val;
 
     sap->sa_family = ib_hwtype.type;
-    ptr = sap->sa_data;
+    ptr = (unsigned char *) sap->sa_data;
 
     i = 0;
     orig = bufp;