make sure to set JAVA_HOME when it's not set and we already know where it is

git-svn-id: http://google-refine.googlecode.com/svn/trunk@139 7d457c2a-affb-35e4-300a-418c747d4874

gridworks

@@ -60,6 +60,10 @@ OPTS="$GRIDWORKS_OPTS"
 
 SYSTEM=`uname`
 
+if [ "$SYSTEM" == "Darwin" ] && [ "$JAVA_HOME" == "" ] ; then
+    export JAVA_HOME="/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home"
+fi
+        
 # ----- actions -------------------------------------------------
 
 check_macosx() {