Remove the definition of INT_FAST32_MIN which is already defined in stdint.h (the correct location).  From Lorenz Meier.

The definition of strncpy() is that empty space should be zero-filled, the patch adds the zero filling (I didn’t know this, see e.g. the POSIX spec here: http://pubs.opengroup.org/onlinepubs/7908799/xsh/strncpy.html). From Lorenz Meier.