quick compilation fix for wxBase

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22483 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/dynlib.cpp

@@ -426,6 +426,8 @@ wxString wxDynamicLibrary::CanonicalizePluginName(const wxString& name,
                 "mac"
 #elif defined(__WXCOCOA__)
                 "cocoa"
+#else // FIXME - wrong!
+                ""
 #endif
        );