Fix a thinko introduced into CountActiveBackends by a recent patch:
authorTom Lane <tgl@sss.pgh.pa.us>
Wed, 29 Jul 2009 15:57:11 +0000 (15:57 +0000)
committerTom Lane <tgl@sss.pgh.pa.us>
Wed, 29 Jul 2009 15:57:11 +0000 (15:57 +0000)
commit2ffae8405d8d2578af0625350c46bf4919455452
tree0e1a1a029fa3c5fa71128c963cb25784217ddd91
parent3ecd52edf64995b40f8069f9d480fe1a7e563472
Fix a thinko introduced into CountActiveBackends by a recent patch:
we should ignore NULL array entries, not non-NULL ones.  This had the
effect of disabling commit_delay, and could have caused a crash in the
rare race condition the patch was intended to fix.

Bug report and diagnosis by Jeff Janes, in bug #4952.
src/backend/storage/ipc/procarray.c