o) Fix error when using funktion from shared libraries (dlopen, dlerror)

(see http://lists.freebsd.org/pipermail/freebsd-questions/2005-October/102547.html)

PR:		-
Submitted by:	"Rob" <spamrefuse@yahoo.com>

math/grace/Makefile

@@ -7,7 +7,7 @@
 
 PORTNAME=	grace
 PORTVERSION=	5.1.18
-PORTREVISION=	0
+PORTREVISION=	1
 CATEGORIES=	math print
 #
 MASTER_SITES=	ftp://plasma-gate.weizmann.ac.il/pub/grace/src/stable/ \

math/grace/files/patch-ag

@@ -0,0 +1,12 @@
+--- src/dlmodule.c.orig  3 Jul 2004 20:47:45 -0000
++++ src/dlmodule.c      27 Oct 2005 11:08:30 -0000
+@@ -89,6 +89,9 @@
+         return RETURN_FAILURE;
+     }
+     
++    /* clear error indicator */
++    dlerror();
++
+     newkey.data = dlsym(handle, dl_function);
+     if ((error = (char *) dlerror()) != NULL) {
+         errmsg(error);