unit: remove union Unit

Now that objects of all unit types are allocated the exact amount of
memory they need, the Unit union has lost its purpose. Remove it.

"Unit" is a more natural name for the base unit class than "Meta", so
rename Meta to Unit.

Access to members of the base class gets simplified.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/device.h b/src/device.h
index 9a56a5205b..a05c3d37b0 100644
--- a/src/device.h
+++ b/src/device.h
@@ -36,7 +36,7 @@ typedef enum DeviceState {
 } DeviceState;
 
 struct Device {
-        Meta meta;
+        Unit meta;
 
         char *sysfs;