(trivial) os: drop redefining getpid() on mingw32
mingw32 does does have getpid() function, so conditionally redefining it to _getpid() isn't necessary.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net
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mingw32 does does have getpid() function, so conditionally redefining it to _getpid() isn't necessary.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net