Optimize header check when reading records (#27)

Author: ydkhatri

dissect/esedb/record.py

@@ -166,7 +166,7 @@ def get(self, column: Column, raw: bool = False) -> RecordValue:
         value = None
         tag_field = None
 
-        if not self.header:
+        if self.header is None:
             return value
 
         if column.is_fixed: