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Fix missing NUL terminators in xmlBuf and xmlBuffer functions

  • buf.c: (xmlBufAddLen):
  • Change check for remaining space to account for the NUL terminator. When adding a length exactly equal to the number of unused bytes, a NUL terminator was not written. (xmlBufResize):
  • Set buf->use and NUL terminator when allocating a new buffer.
  • tree.c: (xmlBufferResize):
  • Set buf->use and NUL terminator when allocating a new buffer. (xmlBufferAddHead):
  • Set NUL terminator before returning early when shifting contents.
Edited by David Kilzer

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