Fix check for an empty bloat report to actually catch empty bloat reports. (#3060)
Fix check for an empty bloat report to actually catch empty bloat reports. (#3060)

The list of files might be nonempty, but we might have an empty list
of changes for each file.
project-chip/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip