fix inadvertent quoting of runes by needsrcquote.

Reference: /n/sources/patch/applied/needsrcquote
Date: Mon Jul 10 02:59:50 CES 2006
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libc/port/needsrcquote.c	Mon Jul 10 02:58:39 2006
+++ /sys/src/libc/port/needsrcquote.c	Mon Jul 10 02:58:35 2006
@@ -6,7 +6,7 @@
 {
 	if(c <= ' ')
 		return 1;
-	if(strchr("`^#*[]=|\\?${}()'<>&;", c))
+	if(c < 0x80 && strchr("`^#*[]=|\\?${}()'<>&;", c))
 		return 1;
 	return 0;
 }