Return number of bytes written

CHANGELOG

@@ -7,7 +7,7 @@ iodine - IP over DNS is now easy
 
 CHANGES:
 
-xxxx-xx-xx: 0.4
+xxxx-xx-xx: 0.3.2
 	- New encoding, 25% more peak upstream throughput
 	- New -l option to set local ip to listen to on server
 

read.c

@@ -86,7 +86,7 @@ int
 readdata(char *packet, char **src, char *dst, size_t len)
 {
 	if (len < 0)
-		return len;
+		return 0;
 
 	memcpy(dst, *src, len);
 
@@ -138,7 +138,7 @@ int
 putdata(char **dst, char *data, size_t len)
 {
 	if (len < 0)
-		return len;
+		return 0;
 
 	memcpy(*dst, data, len);