Fix configure-time warnings for openssl test.
diff --git a/configure.ac b/configure.ac
index 7258cc0..32d4c2f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2428,8 +2428,8 @@
 		if(fd == NULL)
 			exit(1);
 
-		if ((rc = fprintf(fd ,"%08x (%s)\n", SSLeay(),
-		    SSLeay_version(SSLEAY_VERSION))) <0)
+		if ((rc = fprintf(fd, "%08lx (%s)\n", (unsigned long)SSLeay(),
+		    SSLeay_version(SSLEAY_VERSION))) < 0)
 			exit(1);
 
 		exit(0);