Fixes the problem with certain keyboards generating "7" on "Home" key press.

http://9fans.net/archive/2013/03/8
http://9fans.net/archive/2013/03/10

Reference: /n/sources/patch/applied/usb-khome
Date: Fri Mar  1 16:38:24 CET 2013
Signed-off-by: yarikos@gmail.com

--- /sys/src/cmd/usb/kb/kb.c	Fri Mar  1 16:34:28 2013
+++ /sys/src/cmd/usb/kb/kb.c	Fri Mar  1 16:34:21 2013
@@ -473,7 +473,7 @@
 }
 
 
-#define hasesc1(sc)	(((sc) > 0x47) || ((sc) == 0x38))
+#define hasesc1(sc)	(((sc) >= 0x47) || ((sc) == 0x38))
 
 static void
 putmod(KDev *f, uchar mods, uchar omods, uchar mask, uchar esc, uchar sc)