rpcrt4: Dynamically allocate the buffer if the fixed size one isn't large enough. Don't return an inappropriate error if we fail to get the status text, it's only used for diagnostics.

[Huw Davies]

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 dlls/rpcrt4/rpc_transport.c |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)
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