[PATCH 0/1] MR1412: dbghelp: Fix handling of BA_OP_ChangeCodeLength (PDB).

[eric pouech (＠epo)]

This op is heavily used by clang with PDB debug info, while
MSVC barely uses it.

This fixes a bunch of problems when loading PDB files generated
by clang (eg. the PDB files from wine-gecko).

Signed-off-by: Eric Pouech