ocResolve_PEi386():
    when fixing up REL32 relocations, _add_ displacement to value at the
    given offset. The existing value has so far been assumed to be zero
    (which we've asserted for), but curiously wxhaskell-0.9.4's wx.o
    contains lots of interesting non-zero values. Information / specifications
    are awfully thin on the ground as to how to precisely handle these
    relocations, but adding rather than overwriting seems to have a
    generally healthy effect; unable to crash wxhaskell-0.9.4 with a 6.4 build.

Merge to STABLE.