#6 MERGE fixes based on V4.3-001E

[Malleswara Rao P]

In rare circumstances with V4.3-001E and earlier, a
MERGE command from a local variable into a
local/global variable performs a NOOP. This patch
addresses this issue (S9D02-002304).

The fix is to initialize output.out_var.lv.child to 0 to avoid
premature return from lvzwr_var() without having done the
merge.

[Malleswara Rao P]

fixes to op_merge.c and release_name.h based on V4.3-001E