terminal: Don't crash on non-ascii chars

isalpha() and isdigit() don't like huge values.
Noticed with ascii-art in the shell prompt.

diff --git a/clients/terminal.c b/clients/terminal.c
index 782f087..aa072cd 100644 (file)
--- a/clients/terminal.c
+++ b/clients/terminal.c
@@ -2268,6 +2268,9 @@ static int wordsep(int ch)
 {
        const char extra[] = "-,./?%&#:_=+@~";
 
+       if (ch > 127)
+               return 1;
+
        return ch == 0 || !(isalpha(ch) || isdigit(ch) || strchr(extra, ch));
 }