Fixes a bug when the log output is empty.
The length of a slice containing an empty string is 1, not 0, so
the test fails to catch when the log is empty. Instead, take a look at
out, which is just a string.
Signed-off-by: Christopher Jones <tophj@linux.vnet.ibm.com>
Upstream-commit: 2a0291489247b79058f0f94a2af7c5b3f89b78af
Component: engine