Add:

Crash in isalpha() in key.c is c=0xFFFF.

src/TODO

@@ -1,6 +1,8 @@
 Before 4.6.0-pre2
 =================
 
+Crash in isalpha() in key.c is c=0xFFFF.
+
 get_byte() in view.c produces warnings in Valgrind.
 
 Don't allow stdout and stderr from extfs scripts pollute the screen.