ortho: [nfc] align storage-class declarations to Graphviz standard in ortho.h

diff --git a/lib/ortho/ortho.h b/lib/ortho/ortho.h
index 4cf56cf5e464e51db39b5517a9b4c7d7e16e96e1..44b415a8c5f042b9b019cd542572db964f04d863 100644 (file)
--- a/lib/ortho/ortho.h
+++ b/lib/ortho/ortho.h
@@ -18,7 +18,9 @@
 #else
 #define ORTHO_API __declspec(dllimport)
 #endif
-#else
+#endif
+
+#ifndef ORTHO_API
 #define ORTHO_API /* nothing */
 #endif