[ros-svn] [weiden] 20795: Fix code assuming that the Reg* functions set the last error code

[weiden at svn.reactos.org]

Fix code assuming that the Reg* functions set the last error code


Updated files:
trunk/reactos/lib/userenv/desktop.c
trunk/reactos/lib/userenv/environment.c
trunk/reactos/lib/userenv/misc.c
trunk/reactos/lib/userenv/precomp.h
trunk/reactos/lib/userenv/profile.c
trunk/reactos/lib/userenv/registry.c
trunk/reactos/lib/userenv/setup.c
trunk/reactos/lib/userenv/userenv.xml