ports/65411: ports/net/rrdtool fails to build

[Helge Oldach]

Here's a patch:

--- configure.orig	Mon Apr  5 00:04:09 2004
+++ configure	Wed Apr 14 15:54:33 2004
@@ -18840,7 +18840,7 @@

 if test x$local_libpng = xyes
 then
-  PNG_LINK=-lpng
+  PNG_LINK="-L/usr/local/lib -lpng"

 else
   PNG_LIB_DIR=libpng-1.0.9

Helge