jlib: fix unsupported operand type when setting log level

This fixes the following issue when log_levels_find() is used (for
example when setting a log level delta using JLIB_log_levels):
[...]
    scripts/jlib.py:424:log(): level += log_levels_find( caller)
    scripts/jlib.py:334:log_levels_find(): tb = traceback.extract_stack( None, 1+caller)
TypeError: unsupported operand type(s) for +: 'int' and 'FrameInfo'

Note that this fix get JLIB_log_levels working, but it might be
incorrect.

Signed-off-by: Raphaël Mélotte <[email protected]>

Author: rmelotte

scripts/jlib.py

@@ -331,7 +331,11 @@ def log_levels_find( caller):
     if not s_log_levels_items:
         return 0
 
-    tb = traceback.extract_stack( None, 1+caller)
+    if isinstance(caller, inspect.FrameInfo):
+        tb = traceback.extract_stack( None, 1)
+    else:
+        tb = traceback.extract_stack( None, 1+caller)
+
     if len(tb) == 0:
         return 0
     filename, line, function, text = tb[0]