Merge branch 'rj/warning-uninitialized-fix'

Compilation fix.

* rj/warning-uninitialized-fix:
read-cache: fix an -Wmaybe-uninitialized warning
-Wuninitialized: remove some 'init-self' workarounds

diff --cc builtin/rev-list.c
Simple merge

diff --cc fast-import.c
Simple merge

diff --cc merge-recursive.c
Simple merge

diff --cc read-cache.c
Simple merge