correct all the single-digit rune types.  embarrassing.

Reference: /n/atom/patch/applied/runetype1
Date: Thu Mar 13 16:38:37 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libc/port/runetype.c	Thu Mar 13 16:38:23 2014
+++ /sys/src/libc/port/runetype.c	Thu Mar 13 16:38:23 2014
@@ -31,8 +31,8 @@
 	if(p && c >= p[0] && c <= p[1])
 		return p[2] + (c - p[0]);
 	p = bsearch(c, __tolower1, nelem(__tolower1)/2, 2);
-	if(p && c == p[0] && p[2])
-		return p[2] + (c - p[0]);
+	if(p && c == p[0])
+		return p[1];
 	return c;
 }
 
@@ -45,8 +45,8 @@
 	if(p && c >= p[0] && c <= p[1])
 		return p[2] + (c - p[0]);
 	p = bsearch(c, __toupper1, nelem(__toupper1)/2, 2);
-	if(p && c == p[0] && p[2])
-		return p[2] + (c - p[0]);
+	if(p && c == p[0])
+		return p[1];
 	return c;
 }
 
@@ -57,7 +57,7 @@
 
 	p = bsearch(c, __totitle1, nelem(__totitle1)/2, 2);
 	if(p && c == p[0])
-		return p[2] + (c - p[0]);
+		return p[1];
 	return c;
 }