- Enforce JAVA_VERSION when launching javavm(1), otherwise the program

crashes when several JDK versions are installed and javawm(1) picks
  higher version (happens when /usr/ports/Mk/bsd.java.mk is absent,
  contrary to documented selection process which is designed to behave
  almost identically WRT presence/absence of /usr/ports/Mk/bsd.java.mk
- While here, simplify the script a bit and remove keywords and their
  expansion, they are useless for wrapper scripts

PR:		250268
Submitted by:	rodrigo

cad/sweethome3d/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	sweethome3d
 PORTVERSION=	6.4.2
+PORTREVISION=	1
 CATEGORIES=	cad java
 MASTER_SITES=	SF/${PORTNAME}/SweetHome3D-source/${DISTNAME}/
 DISTNAME=	SweetHome3D-${PORTVERSION}-src

cad/sweethome3d/files/sweethome3d.sh.in

@@ -1,8 +1,6 @@
 #!/bin/sh
-#
-# $FreeBSD$
 
 JAVA="%%LOCALBASE%%/bin/java"
-JARPATH="%%JAVALIBDIR%%"
+SH3D_JAR="%%JAVALIBDIR%%/%%JARNAME%%"
 
-exec "${JAVA}" -Xmx1024m -jar "${JARPATH}/%%JARNAME%%" "$@"
+JAVA_VERSION=%%JAVA_VERSION%% exec "${JAVA}" -Xmx1024m -jar "${SH3D_JAR}" "$@"