_check_undef_syms() nit

Factor out the call to the iterator.

1 files changed, 1 insertions, 1 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index 3d2c82a..cb194c6 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -3104,7 +3104,7 @@ class Kconfig(object):
         # Prints warnings for all references to undefined symbols within the
         # Kconfig files
 
-        for sym in (self.syms.viewvalues() if _IS_PY2 else self.syms.values()):
+        for sym in (self.syms.viewvalues if _IS_PY2 else self.syms.values)():
             # - sym.nodes empty means the symbol is undefined (has no
             #   definition locations)
             #