Make is_class_loaded without any arguments fail loudly

diff --git a/xs-src/Mouse.xs b/xs-src/Mouse.xs
index a538e41..c59c15c 100644 (file)
--- a/xs-src/Mouse.xs
+++ b/xs-src/Mouse.xs
@@ -19,7 +19,7 @@ BOOT:
 
 
 bool
-is_class_loaded(SV* sv = &PL_sv_undef)
+is_class_loaded(SV* sv)
 
 void
 get_code_info(CV* code)