[COMPBATT] Free device-related memory only if we failed

Otherwise, we just inserted in the BatteryList this device, and we will
probably crash later when accessing it.

drivers/bus/acpi/compbatt/comppnp.c

@@ -199,9 +199,12 @@ CompBattAddNewBattery(IN PUNICODE_STRING BatteryName,
                          Status);
             }
 
+            if (!NT_SUCCESS(Status))
+            {
                 /* Free the battery data */
                 ExFreePool(BatteryData);
             }
+        }
         else
         {
             /* Fail, no memory */