Make while() handle break

tests/all.test

@@ -226,6 +226,10 @@ null
 1
 [1,2,4,8,16,32,64]
 
+[while(.<100; .*2|if . > 10 then break else . end)]
+1
+[1,2,4,8]
+
 [foreach .[] as $item ([3, null]; if .[0] < 1 then break else [.[0] -1, $item] end; .[1])]
 [11,22,33,44,55,66,77,88,99]
 [11,22,33]