K 10
svn:author
V 3
ken
K 8
svn:date
V 27
2011-06-07T05:04:37.642645Z
K 7
svn:log
V 577
Set pca.p_bufr to NULL when we haven't allocated a buffer.

Otherwise, p_bufr is set to garbage on the stack, and if that garbage
happens to be non-NULL, and the TOLOG or TOCONS flag is set, putbuf()
will get called and attempt to fill the non-existent buffer.

This is really only relevant for tprintf() (and only when the priority is
not -1), but set it in uprintf() and ttyprintf() for completeness.

The next step, to avoid log buffer scrambling, would be to add the
PRINTF_BUFR_SIZE code to tprintf(), but this should prevent panics.

Submitted by:	rmacklem
Found by:	pho

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