fix: exception on flush without buffer

Author: tonnico

aws_lambda_powertools/logging/logger.py

@@ -1197,6 +1197,10 @@ def flush_buffer(self) -> None:
 
         tracer_id = get_tracer_id()
 
+        # no buffer config? return
+        if not self._buffer_config:
+            return
+
         # Flushing log without a tracer id? Return
         if not tracer_id:
             return
@@ -1206,9 +1210,6 @@ def flush_buffer(self) -> None:
         if not buffer:
             return
 
-        if not self._buffer_config:
-            return
-
         # Check ALC level against buffer level
         lambda_log_level = self._get_aws_lambda_log_level()
         if lambda_log_level: