libm17 submodule update

- removed redundant Makefile entry

SP5WWP/m17-decoder/Makefile

@@ -1,5 +1,8 @@
 m17-decoder-sym: m17-decoder-sym.c
-	gcc -I ../../libm17 -L ../../libm17 -Wall -Wextra -O2 m17-decoder-sym.c -o m17-decoder-sym -lm -lm17
+	gcc -I ../../libm17 -Wall -Wextra -O2 m17-decoder-sym.c -o m17-decoder-sym -lm -lm17
+
+install:
+	sudo cp m17-decoder-sym /usr/local/bin
 
 clean:
 	rm -f m17-decoder-sym

SP5WWP/m17-decoder/m17-decoder-sym.c

@@ -8,6 +8,7 @@
 
 #define DECODE_CALLSIGNS
 #define SHOW_VITERBI_ERRS
+#define DIST_THRESH					2.0f //distance threshold for the L2 metric (for syncword detection)
 
 float sample;                       //last raw sample from the stdin
 float last[8];                      //look-back buffer for finding syncwords

libm17

@@ -1 +1 @@
-Subproject commit 1b12db9d27c885f3ac9c0b1204bd600204f4d058
+Subproject commit fa809eb093b64fde247d2da0e2377075e7eef1eb