plpsm - plpgpsm: merge patch: Fix array coercion expressions to ensure

Log Message:
-----------
merge patch: Fix array coercion expressions to ensure that the correct volatility is
seen by code inspecting the expression.

Modified Files:
--------------
plpgpsm/src:
pl_exec.c (r1.56 -> r1.57)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/pl_exec.c.diff?r1=1.56&r2=1.57)