New patch for grantpt

[Ulrich Drepper]

Thanks, I've applied the patch.  I've added a few modifications.  The
test case shouldn't fail if the system doesn't implement SysV pseudo
terminals.  And there is a special function to get the master terminal
file descriptor.

I appreciate using __builtin_expect but it should only be used at the
conditional which recognizes a failure condition.  Inside the block
handling the failure it's normally not necessary (we don't optimize
for failures).  So I moved the __builtin_expect in your grantpt patch
a bit.

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Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
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