pathplan: add missing storage-class attribute declaration for in_poly

Towards https://gitlab.com/graphviz/graphviz/-/issues/2058.

diff --git a/lib/pathplan/pathutil.h b/lib/pathplan/pathutil.h
index 070871c0745cb79bc5518fde5c7013c1339f296c..503ed90f6441abbd26b2ed9385b5d94f8117074a 100644 (file)
--- a/lib/pathplan/pathutil.h
+++ b/lib/pathplan/pathutil.h
@@ -41,7 +41,7 @@ extern "C" {
     PATHUTIL_API int wind(Ppoint_t a, Ppoint_t b, Ppoint_t c);
     PATHUTIL_API COORD dist2(Ppoint_t, Ppoint_t);
 
-    int in_poly(Ppoly_t argpoly, Ppoint_t q);
+    PATHUTIL_API int in_poly(Ppoly_t argpoly, Ppoint_t q);
 
 #undef PATHUTIL_API
 #ifdef __cplusplus