Fixed gross breakage in previous commit.  The malloc sizes for the temporary file names were uninitialized if TMPDIR was set and 1 too small otherwise.
Fixed gross breakage in previous commit.  The malloc sizes for the
temporary file names were uninitialized if TMPDIR was set and 1 too
small otherwise.

Fixed style bugs in previous commit.

Fixed missing checks for malloc failure in previous commit.

Report malloc failure consistently, at least in temp.c.

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