Warning fix

src/edge_utils.c

@@ -1588,7 +1588,7 @@ static void readFromIPSocket(n2n_edge_t * eee, int in_sock) {
 	     (signed int)recvlen, sock_to_cstr(sockbuf1, &sender));
 
   if(eee->conf.header_encryption == HEADER_ENCRYPTION_ENABLED)
-    if ( packet_header_decrypt (udp_buf, recvlen, (char *)eee->conf.community_name, eee->conf.header_encryption_ctx) < 0) {
+    if( packet_header_decrypt (udp_buf, recvlen, (char *)eee->conf.community_name, eee->conf.header_encryption_ctx) == 0) {
       traceEvent(TRACE_DEBUG, "readFromIPSocket failed to decrypt header.");
       return;
     }