Fixed typo.

diff --git a/windows/class.c b/windows/class.c
index 2f15ee4..362ce25 100644
--- a/windows/class.c
+++ b/windows/class.c
@@ -386,8 +386,8 @@
     classPtr->atomName    = atom;
     classPtr->menuNameA   = 0;
     classPtr->menuNameW   = 0;
-    classPtr->classNameA   = 0;
-    classPtr->classNameA   = 0;
+    classPtr->classNameA  = 0;
+    classPtr->classNameW  = 0;
     classPtr->dce         = (style & CS_CLASSDC) ?
                                  DCE_AllocDCE( 0, DCE_CLASS_DC ) : NULL;