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

diff --git a/lib/cdt/cdt.h b/lib/cdt/cdt.h
index 13e5837148bf486c2c772f2d2711368a7c7d9200..6ab58aa0d5922515da1de54daccf922b8e0875b7 100644 (file)
--- a/lib/cdt/cdt.h
+++ b/lib/cdt/cdt.h
@@ -20,7 +20,9 @@ extern "C" {
 #else
 #define CDT_API __declspec(dllimport)
 #endif
-#else
+#endif
+
+#ifndef CDT_API
 #define CDT_API /* nothing */
 #endif