Merge branch 'rs/calloc-array'

CALLOC_ARRAY() macro replaces many uses of xcalloc().

* rs/calloc-array:
  cocci: allow xcalloc(1, size)
  use CALLOC_ARRAY
  git-compat-util.h: drop trailing semicolon from macro definition

diff --cc builtin/receive-pack.c
Simple merge

diff --cc read-cache.c
Simple merge