[patch] fix building on nommu systems (no fork)

[Mike Frysinger]

one of the tests (ditto) uses fork() when it could just as easily use vfork -- 
it simply does an exec, and it already uses _exit

--- a/test/ditto.c
+++ b/test/ditto.c
@@ -161,7 +161,7 @@ open_tty(char *path)
        failed(slave_name);
     }
     sprintf(s_option, "-S%s/%d", slave_name, aslave);
-    if (fork()) {
+    if (vfork() == 0) {
        execlp("xterm", "xterm", s_option, "-title", path, (char *) 0);
        _exit(0);
     }
-mike

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