warning: tweak.c:538 no return at end of function: tohex

Reference: /n/sources/patch/applied/tweak-hex-noreturn
Date: Mon Mar 27 15:11:33 CES 2006
Signed-off-by: xigh@free.fr

--- /sys/src/cmd/tweak.c	Mon Mar 27 15:09:53 2006
+++ /sys/src/cmd/tweak.c	Mon Mar 27 15:09:46 2006
@@ -536,6 +536,7 @@
 		return 10 + (c - 'a');
 	if('A'<=c && c<='F')
 		return 10 + (c - 'A');
+	return 0;		// keeps compiler -w happy
 }
 
 Thing*