fixed scoping issue on resolveKeyword using parents variables.

tests/testvar.jet

@@ -1,10 +1,14 @@
 #!../jet-2.0
+<jet name1="localhost" filterblanklines="true" trimlines="true">
+<set name="test1" value="#[name1]" />
+test1=[$[test1]]
 <set name="ix" value="1" />
 <set name="letterx" value="x" />
 <set name="var$[ix]" value="this is a test $[ix]" />
 <set name="1var1" value="This is another test" />
 <set name="var1var" value="Yet another test" />
 <set name="var11" value="it seems to work." />
+name1=[#[name1]]
 $[$[ix]var$[ix];binary]
 $[var$[ix]]
 $[var$[ix]var]
@@ -15,3 +19,4 @@ $[var$[i$[letterx]]$[i$[letterx]]]
 $[ix]
 <set name="ix" expr="$[ix]+1" />
 $[ix]
+</jet>