This avoids crashing on newer svn layouts where the entries files
don't contain three lines. If someone wants to fix this to
get the right version on newer subversion checkouts, patches
welcome but this at least stops things crashing.
[YOCTO #5363]
(From OE-Core master rev: e850c53d4d8cb877a704a23f9ce02d6185ba3ffa)
(From OE-Core rev: 9fdea109d65c338913caa22e3a09f0408c361536)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>