Added msg re: BCH code and added protective #ifndefs.

src/eotd.h

@@ -1 +1,6 @@
+#ifndef __EOTD_H
+#define __EOTD_H
+
 void eotd_to_text (unsigned char *ais, int ais_len, char *text, int text_size);
+
+#endif

src/pkttest.c

@@ -34,6 +34,7 @@ int main(int argc, char **argv) {
 
 	if (argc < 5) {
 		fprintf(stderr, "Expecting 4+ arguments - m, length, t, type (F or R) and optionally rev to reverse the input bytes.\n");
+		fprintf(stderr, "THE BCH CODE IS NOT VERIFIED!\n");
 		return -1;
 	}