There might not be any executes in a successful run log (because the SwiftScript program may not have called any...). This commit makes the log processing code happier with that situation.
There might not be any executes in a successful run log (because the
SwiftScript program may not have called any...). This commit makes the log
processing code happier with that situation.

git-svn-id: 6ee47c8665bf46900d9baa0afb711c5b4a0eafac@2872 e2bb083e-7f23-0410-b3a8-8253ac9ef6d8

ya7lelkom/swift-k,ya7lelkom/swift-k,swift-lang/swift-k,ya7lelkom/swift-k,swift-lang/swift-k,swift-lang/swift-k,ya7lelkom/swift-k,ya7lelkom/swift-k,swift-lang/swift-k,swift-lang/swift-k,swift-lang/swift-k,ya7lelkom/swift-k,swift-lang/swift-k,swift-lang/swift-k,ya7lelkom/swift-k,ya7lelkom/swift-k,ya7lelkom/swift-k,ya7lelkom/swift-k,swift-lang/swift-k,swift-lang/swift-k