make color a build-time option for telnet-proxy
diff --git a/Makefile b/Makefile
index 5b59f9a..81847dd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
-CFLAGS = -Wall -g -O0 -DHAVE_ZLIB
+CFLAGS = -Wall -g -O0 -DHAVE_ZLIB -DENABLE_COLOR
 LFLAGS = -lz
 
-telnet-proxy: telnet-proxy.c libtelnet.c libtelnet.h
+telnet-proxy: telnet-proxy.c libtelnet.c libtelnet.h Makefile
 	$(CC) -o telnet-proxy $(CFLAGS) telnet-proxy.c libtelnet.c $(LFLAGS)