Fix typo (a forgotten 'return' statement...)

afvincent · afvincent · commit 59328e6fb118 · 2017-02-14T01:41:25.000+01:00
diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
@@ -539,7 +539,7 @@ def validate_ps_distiller(s):
             addendum=(" See 'validate_negative_linestyle_legacy' " +
                       "deprecation warning for more information."))
 def validate_negative_linestyle(s):
-    _validate_negative_linestyle(s)
+    return _validate_negative_linestyle(s)
 
 
 @deprecated('3.0.0?', pending=True,
