Use a variable-length array
Use a variable-length array

The debug message buffer is no more with a fixed size (around 256 bytes
of buffer to log) but uses a variable-length array.

This is available in GCC in C90 mode and is mandatory in C99 standard.

git-svn-id: d8b078d517c8be834637447f210d7177f0fa38d6@5897 0ce88b0d-b2fd-0310-8134-9614164e65ea

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