Fix as commented

Signed-off-by: Wonjae Park <[email protected]>

Author: JustinWonjaePark

src/fosslight_util/oss_item.py

@@ -60,7 +60,7 @@ def copyright(self):
 
     @copyright.setter
     def copyright(self, value):
-        if value != "":
+        if value:
             if isinstance(value, list):
                 value = list(set(value))
             else: