pgsql: Fix memory leak in printtup.c.

Fix memory leak in printtup.c. Commit f2dec34e1 changed things so that printtup's output stringinfo buffer was allocated outside the per-row temporary context, not inside it. This creates a need to free that buffer explicitly when the temp context is freed, but that was overlooked. In most cases

pgsql: Fix memory leak in printtup.c.

Fix memory leak in printtup.c. Commit f2dec34e1 changed things so that printtup's output stringinfo buffer was allocated outside the per-row temporary context, not inside it. This creates a need to free that buffer explicitly when the temp context is freed, but that was overlooked. In most cases