make shell math operations style more succulent

Convert the style:
	var=$((${var} + 1))
to:
	: $(( var += 1 ))

The latter is easier to read imo.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

init.d/consolefont.in

@@ -49,7 +49,7 @@ start()
 			retval=1
 			break
 		fi
-		x=$(($x + 1))
+		: $(( x += 1 ))
 	done
 	eend $retval